Hello there, @MBonomo.
Welcome to the Intuit Community. I can help you record the payables in your QuickBooks.
We have to create a purchase order, receive inventory, enter bills against inventory, and pay bills.

Step 1: Create purchase order
Step 2: Receive inventory
Step 3: Enter bills against inventory
Step 4: Pay bills
When entering the payment, you have to modify the amount on the pay section. This is the right way of recording the partial payment.

That should record the transaction, MBonomo. For additional insights, please refer to this article: Accounts Payable workflows in QuickBooks Desktop.
Please know that I'm still here to help you more if you have follow up questions. Just add a comment below or mention my name. Wishing you and your business continued success!