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Finding the Fourth Proportional to 392,029.92, 587,989.50 and 125,755.86

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Solution

The fourth proportional to 392,029.92, 587,989.50 and 125,755.86 is: 188,616.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,029.92 : 587,989.50 = 125,755.86 : x
  2. Step 2: Convert to fraction form
    392,029.92/587,989.50 = 125,755.86/x
  3. Step 3: Cross multiply
    392,029.92x = 587,989.50 × 125,755.86
  4. Step 4: Simplify right side
    392,029.92x = 73,943,125,243.47
  5. Step 5: Solve for x
    x = 73,943,125,243.47/392,029.92
  6. Step 6: Final answer
    x = 188,616.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.