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Finding the Fourth Proportional to 137,679.61, 206,531.72 and 42,910.60

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Solution

The fourth proportional to 137,679.61, 206,531.72 and 42,910.60 is: 64,369.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,679.61 : 206,531.72 = 42,910.60 : x
  2. Step 2: Convert to fraction form
    137,679.61/206,531.72 = 42,910.60/x
  3. Step 3: Cross multiply
    137,679.61x = 206,531.72 × 42,910.60
  4. Step 4: Simplify right side
    137,679.61x = 8,862,399,293.35
  5. Step 5: Solve for x
    x = 8,862,399,293.35/137,679.61
  6. Step 6: Final answer
    x = 64,369.73

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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.