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Finding the Fourth Proportional to 126,481.80, 189,941.40 and 67,432.80

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Solution

The fourth proportional to 126,481.80, 189,941.40 and 67,432.80 is: 101,265.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,481.80 : 189,941.40 = 67,432.80 : x
  2. Step 2: Convert to fraction form
    126,481.80/189,941.40 = 67,432.80/x
  3. Step 3: Cross multiply
    126,481.80x = 189,941.40 × 67,432.80
  4. Step 4: Simplify right side
    126,481.80x = 12,808,280,437.92
  5. Step 5: Solve for x
    x = 12,808,280,437.92/126,481.80
  6. Step 6: Final answer
    x = 101,265.80

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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.