In: Math
Determine the periodic deposit. Round up to the nearest dolar. How much of the financial goal comes from deposits and how much comes from interest?
Periodic Deposit: $? at the end of every six months
Rate: 6% compounded semiannually
Time: 8 years
Financial Goal: $490,000
The future value (F) of an annuity is given by F = (P/r)[(1+r)n-1], where P is the periodic payment , r is the rate per period and n is the number of periods.
Here, F = $ 490000, r = 6/200 = 0.03 and n = 8*2 = 16.
Hence 490000 = (P/0.03)[ (1.03)16 -1] so that P = 490000*0.03/[ (1.03)16 -1] = 14700/0.604706439 = $ ( on rounding off to the nearest cent).
Thus, the periodic deposit required to achieve the financial goal is $ 24309.32 every six months.
The part of the financial goal that comes from the deposits is 16*$ 24309.32 = $ 388949.12.
The part of the financial goal that comes from the interest is $ 490000-$ 388949.12 = $ 101050.88.