Attribute Value Inheritance

Hi

We have a product structure where under the root product we have a child product with some attributes and under that child product we have a grand child product with some attributes as well.

Now the requirement we have is when for an attribute associated to the child product for example tariff attribute we select a value then for the grand child product as well the same value should be reflecting.

The problem we are facing is the child product cab be maximum 10 hence we are not able to understand how to achieve the requirement and map the inherited value correctly.