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Finding the Fourth Proportional to 126,697.28, 189,989.76 and 67,521.92

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Solution

The fourth proportional to 126,697.28, 189,989.76 and 67,521.92 is: 101,252.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,697.28 : 189,989.76 = 67,521.92 : x
  2. Step 2: Convert to fraction form
    126,697.28/189,989.76 = 67,521.92/x
  3. Step 3: Cross multiply
    126,697.28x = 189,989.76 × 67,521.92
  4. Step 4: Simplify right side
    126,697.28x = 12,828,473,375.54
  5. Step 5: Solve for x
    x = 12,828,473,375.54/126,697.28
  6. Step 6: Final answer
    x = 101,252.95

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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.