Question

The mean proportional between 68 and 272 is:

• A. 114
• B. 136
• C. 126
• D. 124

Answer 1

Answer:

B. 136

The mean proportional (geometric mean) between two numbers (a) and (b) is:

$\sqrt{a \times b}$

Apply formula

$\sqrt{68 \times 272}$

$68 \times 272 = 18496$

Square root

$\sqrt{18496} = 136$

Final Answer: 136