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Finding the Fourth Proportional to 138,773.52, 207,992.67 and 67,589.49

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Solution

The fourth proportional to 138,773.52, 207,992.67 and 67,589.49 is: 101,302.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,773.52 : 207,992.67 = 67,589.49 : x
  2. Step 2: Convert to fraction form
    138,773.52/207,992.67 = 67,589.49/x
  3. Step 3: Cross multiply
    138,773.52x = 207,992.67 × 67,589.49
  4. Step 4: Simplify right side
    138,773.52x = 14,058,118,489.04
  5. Step 5: Solve for x
    x = 14,058,118,489.04/138,773.52
  6. Step 6: Final answer
    x = 101,302.60

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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.