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Finding the Fourth Proportional to 138,375.48, 207,559.53 and 38,531.64

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Solution

The fourth proportional to 138,375.48, 207,559.53 and 38,531.64 is: 57,796.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,375.48 : 207,559.53 = 38,531.64 : x
  2. Step 2: Convert to fraction form
    138,375.48/207,559.53 = 38,531.64/x
  3. Step 3: Cross multiply
    138,375.48x = 207,559.53 × 38,531.64
  4. Step 4: Simplify right side
    138,375.48x = 7,997,609,088.53
  5. Step 5: Solve for x
    x = 7,997,609,088.53/138,375.48
  6. Step 6: Final answer
    x = 57,796.43

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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.