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Finding the Fourth Proportional to 239,876.89, 359,815.34 and 71,399.66

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Solution

The fourth proportional to 239,876.89, 359,815.34 and 71,399.66 is: 107,099.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,876.89 : 359,815.34 = 71,399.66 : x
  2. Step 2: Convert to fraction form
    239,876.89/359,815.34 = 71,399.66/x
  3. Step 3: Cross multiply
    239,876.89x = 359,815.34 × 71,399.66
  4. Step 4: Simplify right side
    239,876.89x = 25,690,691,318.21
  5. Step 5: Solve for x
    x = 25,690,691,318.21/239,876.89
  6. Step 6: Final answer
    x = 107,099.49

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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.