Save node when content with reference to it is created

Brief overview of relevant aspects of my site:
Content type - review: created by users, contains entity reference field to business page being reviewed
Content type - business: contains fields which average, from the database, the ratings submitted by users using the review content type.

I need to create a rule which saves the business page when a Review which references it is created/saved by a user. This is necessary because the fields with averages in them only update when the node is saved. What would be the best way to go about doing this?