A loan is being repaid in five annual payments. The first two payments are $200. The third and fourth payments are $400. The final payment is $500. The annual effective interest rate is 6%. Determine the interest portion of the third payment.

Interest portion = 80.2

Explanation:

Present Value of Payments =  P=S/(1+i)^n

P = present Value

S= Future Value

i = Interest

N= time

Amount of third payment = 500

So the Present Value of The 3rd payment is = 500/(1+6%)^3 =419.80

Third installment = 500 this is future value so it contain the interest at 6%

Present Value      = 419.8

Time Value of money or Interest = 500-419.8 = 80.2

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