Home / 129,240.28-178,355.72-78,262.52

Finding the Fourth Proportional to 129,240.28, 178,355.72 and 78,262.52

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Solution

The fourth proportional to 129,240.28, 178,355.72 and 78,262.52 is: 108,004.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,240.28 : 178,355.72 = 78,262.52 : x
  2. Step 2: Convert to fraction form
    129,240.28/178,355.72 = 78,262.52/x
  3. Step 3: Cross multiply
    129,240.28x = 178,355.72 × 78,262.52
  4. Step 4: Simplify right side
    129,240.28x = 13,958,568,103.61
  5. Step 5: Solve for x
    x = 13,958,568,103.61/129,240.28
  6. Step 6: Final answer
    x = 108,004.78

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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.