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Finding the Fourth Proportional to 139,572.54, 209,327.37 and 39,730.53

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Solution

The fourth proportional to 139,572.54, 209,327.37 and 39,730.53 is: 59,586.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,572.54 : 209,327.37 = 39,730.53 : x
  2. Step 2: Convert to fraction form
    139,572.54/209,327.37 = 39,730.53/x
  3. Step 3: Cross multiply
    139,572.54x = 209,327.37 × 39,730.53
  4. Step 4: Simplify right side
    139,572.54x = 8,316,687,353.61
  5. Step 5: Solve for x
    x = 8,316,687,353.61/139,572.54
  6. Step 6: Final answer
    x = 59,586.85

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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.