Home / 129,326.97-178,469.49-72,738.35

Finding the Fourth Proportional to 129,326.97, 178,469.49 and 72,738.35

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Solution

The fourth proportional to 129,326.97, 178,469.49 and 72,738.35 is: 100,377.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,326.97 : 178,469.49 = 72,738.35 : x
  2. Step 2: Convert to fraction form
    129,326.97/178,469.49 = 72,738.35/x
  3. Step 3: Cross multiply
    129,326.97x = 178,469.49 × 72,738.35
  4. Step 4: Simplify right side
    129,326.97x = 12,981,576,277.62
  5. Step 5: Solve for x
    x = 12,981,576,277.62/129,326.97
  6. Step 6: Final answer
    x = 100,377.95

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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.