YOU SAID:

The taller they are, the harder they fall

INTO JAPANESE

背が高いほど、倒れにくくなります。

BACK INTO ENGLISH

The taller you are, the less likely you are to fall.

INTO JAPANESE

背が高いほど、転倒する可能性は低くなります。

BACK INTO ENGLISH

The taller you are, the less likely you are to fall.