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Finding the Fourth Proportional to 138,073.48, 207,112.78 and 43,301.55

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Solution

The fourth proportional to 138,073.48, 207,112.78 and 43,301.55 is: 64,953.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,073.48 : 207,112.78 = 43,301.55 : x
  2. Step 2: Convert to fraction form
    138,073.48/207,112.78 = 43,301.55/x
  3. Step 3: Cross multiply
    138,073.48x = 207,112.78 × 43,301.55
  4. Step 4: Simplify right side
    138,073.48x = 8,968,305,229.61
  5. Step 5: Solve for x
    x = 8,968,305,229.61/138,073.48
  6. Step 6: Final answer
    x = 64,953.14

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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.