Question

4. Find the mean proportional between
(1) 81 and 100​

Answer 1

Answer:

x = 90

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Answer 2

Answer:

let the proportional be x

81:x:x:100

product of mean= product of extreme

81*100 = x*x

8100= x²

✓8100= x

✓90²= x

90= x

81:90:90:100 is the answer