find mean proportion 81 and 121
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1
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Step-by-step explanation:
Mean proportion between 81 & 121 = 99.
Answered by
3
Answer:
Step-by-step explanation:
the mean proportion between 81 and 121,
81 : a : 121
=> 81 : a :: a : 121
=> 81/a = a/121
=> a² = 81 * 121
=> a² = 9² * 11²
=> a² = ( 9 * 11)²
=> a² = 99²
=> a = 99
Mean proportion between 81 & 121 = 99
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