Home / 87,855.86-121,249.78-50,135.78

Finding the Fourth Proportional to 87,855.86, 121,249.78 and 50,135.78

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Solution

The fourth proportional to 87,855.86, 121,249.78 and 50,135.78 is: 69,192.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,855.86 : 121,249.78 = 50,135.78 : x
  2. Step 2: Convert to fraction form
    87,855.86/121,249.78 = 50,135.78/x
  3. Step 3: Cross multiply
    87,855.86x = 121,249.78 × 50,135.78
  4. Step 4: Simplify right side
    87,855.86x = 6,078,952,295.13
  5. Step 5: Solve for x
    x = 6,078,952,295.13/87,855.86
  6. Step 6: Final answer
    x = 69,192.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.