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Finding the Fourth Proportional to 138,599.45, 207,899.87 and 38,760.02

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Solution

The fourth proportional to 138,599.45, 207,899.87 and 38,760.02 is: 58,140.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,599.45 : 207,899.87 = 38,760.02 : x
  2. Step 2: Convert to fraction form
    138,599.45/207,899.87 = 38,760.02/x
  3. Step 3: Cross multiply
    138,599.45x = 207,899.87 × 38,760.02
  4. Step 4: Simplify right side
    138,599.45x = 8,058,202,665.52
  5. Step 5: Solve for x
    x = 8,058,202,665.52/138,599.45
  6. Step 6: Final answer
    x = 58,140.22

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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.