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Finding the Fourth Proportional to 138,512.75, 207,753.55 and 37,318.28

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Solution

The fourth proportional to 138,512.75, 207,753.55 and 37,318.28 is: 55,973.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,512.75 : 207,753.55 = 37,318.28 : x
  2. Step 2: Convert to fraction form
    138,512.75/207,753.55 = 37,318.28/x
  3. Step 3: Cross multiply
    138,512.75x = 207,753.55 × 37,318.28
  4. Step 4: Simplify right side
    138,512.75x = 7,753,004,017.83
  5. Step 5: Solve for x
    x = 7,753,004,017.83/138,512.75
  6. Step 6: Final answer
    x = 55,973.21

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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.