using System;

public class Program

{

    static double[] a = new double[]{0.5, 0.5, 0};

    static double[] b = new double[]{16384.5, 136384.5, -113615.5};

    static double fromA = 60000;

    public static void Main()

    {

        Console.WriteLine("Start");

        double dist = Sqr(a[0] - b[0]) + Sqr(a[1] - b[1]) + Sqr(a[2] - b[2]);

        dist = Math.Sqrt(dist);

        double m = fromA;

        double n = dist - fromA;

        double[] result = new double[]{RatioPos(a[0], b[0], m, n), RatioPos(a[1], b[1], m, n), RatioPos(a[2], b[2], m, n)};

        Console.WriteLine("(" + result[0] + ", " + result[1] + ", " + result[2] + ")");

    }

​

    private static double Sqr(double i){

        return i * i;

    }

    private static double RatioPos(double x1, double x2, double m, double n){

        return (m*x1 + n*x2) / (m+n);

    }

}