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Finding the Fourth Proportional to 247,512.71, 341,539.20 and 138,601.87

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Solution

The fourth proportional to 247,512.71, 341,539.20 and 138,601.87 is: 191,254.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,512.71 : 341,539.20 = 138,601.87 : x
  2. Step 2: Convert to fraction form
    247,512.71/341,539.20 = 138,601.87/x
  3. Step 3: Cross multiply
    247,512.71x = 341,539.20 × 138,601.87
  4. Step 4: Simplify right side
    247,512.71x = 47,337,970,944.46
  5. Step 5: Solve for x
    x = 47,337,970,944.46/247,512.71
  6. Step 6: Final answer
    x = 191,254.71

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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.