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Finding the Fourth Proportional to 247,905.31, 371,910.21 and 129,544.87

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Solution

The fourth proportional to 247,905.31, 371,910.21 and 129,544.87 is: 194,344.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,905.31 : 371,910.21 = 129,544.87 : x
  2. Step 2: Convert to fraction form
    247,905.31/371,910.21 = 129,544.87/x
  3. Step 3: Cross multiply
    247,905.31x = 371,910.21 × 129,544.87
  4. Step 4: Simplify right side
    247,905.31x = 48,179,059,806.12
  5. Step 5: Solve for x
    x = 48,179,059,806.12/247,905.31
  6. Step 6: Final answer
    x = 194,344.61

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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.