If $12, 36, 1.5, 4.5$ are in proportion, then:

$12 \times 36 = 1.5 \times 4.5$

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$12 \times 1.5 = 36 \times 4.5$

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$12 \times 4.5 = 36 \times 1.5$

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none of these

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Solution

The correct option is C
$12 \times 4.5 = 36 \times 1.5$

We know that,
Four terms are said to be an in proportion if
Product of extreme $=$ Product of means
Given the numbers are $12, 36, 1.5, 4.5$
So, they are in proportion if $12 \times 4.5 = 36 \times 1.5$
Hence, option (C) is correct.

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