In: Finance
After receiving an inheritance of $30,000 on her 21st birthday, Julia deposited the inheritance in a savings account with an effective annual interest rate of 6%. She decided to make regular deposits, beginning with $1,000 on her 22nd birthday, and increasing by $250 each year (that is, $1,250 on her 23rd birthday, $1,500 on her 24th birthday, etc.) What is the future worth of Julia’s deposits on her 58th birthday?
Solution:
Statement of interest and deposit balance at the end o year | ||||
Age | Opening Balance | Investment | Interest (Opening Balance*6%) | Closing Balance (Opening + Investment + Interest) |
21 | $0.00 | $30,000.00 | $0.00 | $30,000.00 |
22 | $30,000.00 | $1,000.00 | $1,800.00 | $32,800.00 |
23 | $32,800.00 | $1,250.00 | $1,968.00 | $36,018.00 |
24 | $36,018.00 | $1,500.00 | $2,161.08 | $39,679.08 |
25 | $39,679.08 | $1,750.00 | $2,380.74 | $43,809.82 |
26 | $43,809.82 | $2,000.00 | $2,628.59 | $48,438.41 |
27 | $48,438.41 | $2,250.00 | $2,906.30 | $53,594.72 |
28 | $53,594.72 | $2,500.00 | $3,215.68 | $59,310.40 |
29 | $59,310.40 | $2,750.00 | $3,558.62 | $65,619.03 |
30 | $65,619.03 | $3,000.00 | $3,937.14 | $72,556.17 |
31 | $72,556.17 | $3,250.00 | $4,353.37 | $80,159.54 |
32 | $80,159.54 | $3,500.00 | $4,809.57 | $88,469.11 |
33 | $88,469.11 | $3,750.00 | $5,308.15 | $97,527.26 |
34 | $97,527.26 | $4,000.00 | $5,851.64 | $107,378.89 |
35 | $107,378.89 | $4,250.00 | $6,442.73 | $118,071.63 |
36 | $118,071.63 | $4,500.00 | $7,084.30 | $129,655.92 |
37 | $129,655.92 | $4,750.00 | $7,779.36 | $142,185.28 |
38 | $142,185.28 | $5,000.00 | $8,531.12 | $155,716.40 |
39 | $155,716.40 | $5,250.00 | $9,342.98 | $170,309.38 |
40 | $170,309.38 | $5,500.00 | $10,218.56 | $186,027.94 |
41 | $186,027.94 | $5,750.00 | $11,161.68 | $202,939.62 |
42 | $202,939.62 | $6,000.00 | $12,176.38 | $221,116.00 |
43 | $221,116.00 | $6,250.00 | $13,266.96 | $240,632.96 |
44 | $240,632.96 | $6,500.00 | $14,437.98 | $261,570.93 |
45 | $261,570.93 | $6,750.00 | $15,694.26 | $284,015.19 |
46 | $284,015.19 | $7,000.00 | $17,040.91 | $308,056.10 |
47 | $308,056.10 | $7,250.00 | $18,483.37 | $333,789.47 |
48 | $333,789.47 | $7,500.00 | $20,027.37 | $361,316.83 |
49 | $361,316.83 | $7,750.00 | $21,679.01 | $390,745.84 |
50 | $390,745.84 | $8,000.00 | $23,444.75 | $422,190.59 |
51 | $422,190.59 | $8,250.00 | $25,331.44 | $455,772.03 |
52 | $455,772.03 | $8,500.00 | $27,346.32 | $491,618.35 |
53 | $491,618.35 | $8,750.00 | $29,497.10 | $529,865.45 |
54 | $529,865.45 | $9,000.00 | $31,791.93 | $570,657.38 |
55 | $570,657.38 | $9,250.00 | $34,239.44 | $614,146.82 |
56 | $614,146.82 | $9,500.00 | $36,848.81 | $660,495.63 |
57 | $660,495.63 | $9,750.00 | $39,629.74 | $709,875.37 |
58 | $709,875.37 | $10,000.00 | $42,592.52 | $762,467.89 |
Therefore future worth of Julia's deposits on her 58th birthday is $762,467.89.