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Finding the Fourth Proportional to 221,372.92, 331,862.14 and 81,098.74

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Solution

The fourth proportional to 221,372.92, 331,862.14 and 81,098.74 is: 121,575.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,372.92 : 331,862.14 = 81,098.74 : x
  2. Step 2: Convert to fraction form
    221,372.92/331,862.14 = 81,098.74/x
  3. Step 3: Cross multiply
    221,372.92x = 331,862.14 × 81,098.74
  4. Step 4: Simplify right side
    221,372.92x = 26,913,601,407.70
  5. Step 5: Solve for x
    x = 26,913,601,407.70/221,372.92
  6. Step 6: Final answer
    x = 121,575.85

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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.