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Finding the Fourth Proportional to 138,061.53, 207,246.03 and 71,483.78

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Solution

The fourth proportional to 138,061.53, 207,246.03 and 71,483.78 is: 107,305.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,061.53 : 207,246.03 = 71,483.78 : x
  2. Step 2: Convert to fraction form
    138,061.53/207,246.03 = 71,483.78/x
  3. Step 3: Cross multiply
    138,061.53x = 207,246.03 × 71,483.78
  4. Step 4: Simplify right side
    138,061.53x = 14,814,729,864.44
  5. Step 5: Solve for x
    x = 14,814,729,864.44/138,061.53
  6. Step 6: Final answer
    x = 107,305.27

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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.