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Finding the Fourth Proportional to 124,420.20, 186,425.10 and 71,737.80

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Solution

The fourth proportional to 124,420.20, 186,425.10 and 71,737.80 is: 107,488.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,420.20 : 186,425.10 = 71,737.80 : x
  2. Step 2: Convert to fraction form
    124,420.20/186,425.10 = 71,737.80/x
  3. Step 3: Cross multiply
    124,420.20x = 186,425.10 × 71,737.80
  4. Step 4: Simplify right side
    124,420.20x = 13,373,726,538.78
  5. Step 5: Solve for x
    x = 13,373,726,538.78/124,420.20
  6. Step 6: Final answer
    x = 107,488.39

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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.