Home / 129,691.73-178,974.24-72,331.13

Finding the Fourth Proportional to 129,691.73, 178,974.24 and 72,331.13

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Solution

The fourth proportional to 129,691.73, 178,974.24 and 72,331.13 is: 99,816.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,691.73 : 178,974.24 = 72,331.13 : x
  2. Step 2: Convert to fraction form
    129,691.73/178,974.24 = 72,331.13/x
  3. Step 3: Cross multiply
    129,691.73x = 178,974.24 × 72,331.13
  4. Step 4: Simplify right side
    129,691.73x = 12,945,408,596.42
  5. Step 5: Solve for x
    x = 12,945,408,596.42/129,691.73
  6. Step 6: Final answer
    x = 99,816.76

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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.