Question

Find the mean proportional between 81 and 121.​

Answer 1

99 is the answer ......

hope it helps.........

Answer 2

Step-by-step explanation:

Let the mean proportional be x.

$\frac{81}{x} = \frac{x}{121}$

${x}^{2} = 121 \times 81$

${x}^{2} = 9801$

$x = \sqrt{9801}$

$x = 99$

The mean proportional between 81 and 121 is 99.