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The mean proportional between 25 and 121 is equal to:

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The mean proportional between 25 and 121 is equal to:
1. 100
2. 55
3. 60
4. 66
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1 Answer

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Best answer
Correct Answer - Option 2 : 55

Formula Used:

mean proportional 'c' between a and b

⇒ c = √(ab) 

Calculation: 

Let the mean proportional between 25 and 121 be x

⇒ x = √(25 × 121)

⇒ x = 5 × 11 = 55

∴ The mean proportional is 55.

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