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Finding the Fourth Proportional to 138,221.25, 207,331.71 and 43,459.72

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Solution

The fourth proportional to 138,221.25, 207,331.71 and 43,459.72 is: 65,189.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,221.25 : 207,331.71 = 43,459.72 : x
  2. Step 2: Convert to fraction form
    138,221.25/207,331.71 = 43,459.72/x
  3. Step 3: Cross multiply
    138,221.25x = 207,331.71 × 43,459.72
  4. Step 4: Simplify right side
    138,221.25x = 9,010,577,545.39
  5. Step 5: Solve for x
    x = 9,010,577,545.39/138,221.25
  6. Step 6: Final answer
    x = 65,189.52

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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.