Are the following quantities in proportion or not?
$8, 10, 16, a n d 20$

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Solution

Step 1: Product of extreme terms $= 8 \times 20 = 160$
Product of middle terms $= 10 \times 20 = 160$
Step 2: Product of extreme terms $=$ Product of middle terms
Final Answer: Yes, $8, 10, 16, a n d 20$ are in proportion.

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