Answer :

To solve the question of what number 10% equals one fourth of 120, follow these steps:

1. Calculate one fourth of 120.
[tex]\[ \text{One fourth of 120} = \frac{120}{4} = 30 \][/tex]

2. Set up the equation where one fourth of 120 is equal to 10% of some number [tex]\( x \)[/tex].
[tex]\[ 30 = 0.1 \times x \][/tex]

3. Solve for [tex]\( x \)[/tex].
[tex]\[ x = \frac{30}{0.1} \][/tex]

4. Perform the division.
[tex]\[ x = 300 \][/tex]

Therefore, 10% of the number 300 is equal to one fourth of 120.

The correct answer is:
(D) 300