Two charged insulating spheres, Sphere X with net charge \(+Q\) and Sphere Y with net charge \(+3Q\), are fixed a distance \(d\) apart. Due to mutual electrostatic forces, bound surface charges on both spheres shift slightly within their molecular structures as the spheres polarize each other. Which of the following claims correctly compares the magnitude of the electrostatic force \(F_{\text{X on Y}}\) exerted by Sphere X on Sphere Y to the magnitude of the electrostatic force \(F_{\text{Y on X}}\) exerted by Sphere Y on Sphere X, and provides a correct physical justification?