IPA: /prəˈpɔːrʃənəblɪ/
KK: /prəˈpɔrʃənəblē/
In a way that relates to or is based on proportion; in a manner that is proportional to something else.
The costs were distributed proportionably among all participants.
Proportionably → It is formed from "proportio" (from Latin, meaning a part or ratio) and the suffix "-able" (meaning capable of). The word "proportionably" means in a manner that is proportional or in accordance with a ratio.
Think of 'proportio' which refers to a part or ratio, helping you remember that 'proportionably' means something is done in a way that reflects a certain ratio.