a) 71

b) 75

c) 81

d) 85

correct answer is: c) 81

#### Explanation

Let, the number is ‘x’

According to the question,

36\times75\times x=218700

\rightarrow x=\large\frac{218700}{36\times75}

\rightarrow x=81

\therefore The number is 81 .**Ans:** The number is 81.

*Other ways to phrase this particular query are:*

**What is the third number when the product of 36 and 75 is multiplied by it, resulting in 218700?****Given that the product of 36, 75, and another number is 218700, what is the value of the third number?****When 36 and 75 are multiplied by a certain number, the result is 218700. What is that number?****Calculate the unknown number if the product of 36, 75, and it results in 218700.****Find the missing number if the product of 36, 75, and the unknown number equals 218700.**