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Finding the Fourth Proportional to 139,562.30, 209,278.65 and 60,635.90

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Solution

The fourth proportional to 139,562.30, 209,278.65 and 60,635.90 is: 90,925.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,562.30 : 209,278.65 = 60,635.90 : x
  2. Step 2: Convert to fraction form
    139,562.30/209,278.65 = 60,635.90/x
  3. Step 3: Cross multiply
    139,562.30x = 209,278.65 × 60,635.90
  4. Step 4: Simplify right side
    139,562.30x = 12,689,799,293.54
  5. Step 5: Solve for x
    x = 12,689,799,293.54/139,562.30
  6. Step 6: Final answer
    x = 90,925.70

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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.