Home / 129,517.92-178,743.96-72,162

Finding the Fourth Proportional to 129,517.92, 178,743.96 and 72,162

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Solution

The fourth proportional to 129,517.92, 178,743.96 and 72,162 is: 99,588.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,517.92 : 178,743.96 = 72,162 : x
  2. Step 2: Convert to fraction form
    129,517.92/178,743.96 = 72,162/x
  3. Step 3: Cross multiply
    129,517.92x = 178,743.96 × 72,162
  4. Step 4: Simplify right side
    129,517.92x = 12,898,521,641.52
  5. Step 5: Solve for x
    x = 12,898,521,641.52/129,517.92
  6. Step 6: Final answer
    x = 99,588.70

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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.