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Finding the Fourth Proportional to 138,951.81, 191,754.20 and 75,289.61

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Solution

The fourth proportional to 138,951.81, 191,754.20 and 75,289.61 is: 103,900.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,951.81 : 191,754.20 = 75,289.61 : x
  2. Step 2: Convert to fraction form
    138,951.81/191,754.20 = 75,289.61/x
  3. Step 3: Cross multiply
    138,951.81x = 191,754.20 × 75,289.61
  4. Step 4: Simplify right side
    138,951.81x = 14,437,098,933.86
  5. Step 5: Solve for x
    x = 14,437,098,933.86/138,951.81
  6. Step 6: Final answer
    x = 103,900.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.