All amounts are in $
Let the amount to be invested today be Y
Deposit today Y
At end of 1st year = Y x 1.1 = 1.1Y
We will withdraw 25,000 at start of year 2
So Balance at end of 2nd year
= (1.1Y - 25,000) x 1.1
= 1.21Y - 27,500
At beginning of year 3, we withdraw 3,000
So balance at end of year 3
= (1.21Y - 27,500 - 3,000) x 1.1
= 1.331Y - 33,550
At start of year 4, 1000 is deposited
Balance at end of year 4 will be
= (1.331Y - 33,550 + 1,000) x 1.1
= 1.4641Y - 35,805
At start of year 5 the balance must be equal to 5,000 (payment to be made)
1.4641Y - 35,850 = 5,000
1.4641Y = 5,000 + 35,805
Y = (40,805/1.4641)
Initial deposit = $27,870.36 (positive)
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