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Finding the Fourth Proportional to 126,050.76, 189,076.12 and 86,487.92

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Solution

The fourth proportional to 126,050.76, 189,076.12 and 86,487.92 is: 129,731.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,050.76 : 189,076.12 = 86,487.92 : x
  2. Step 2: Convert to fraction form
    126,050.76/189,076.12 = 86,487.92/x
  3. Step 3: Cross multiply
    126,050.76x = 189,076.12 × 86,487.92
  4. Step 4: Simplify right side
    126,050.76x = 16,352,800,340.47
  5. Step 5: Solve for x
    x = 16,352,800,340.47/126,050.76
  6. Step 6: Final answer
    x = 129,731.87

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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.