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Finding the Fourth Proportional to 126,475.20, 189,712.80 and 63,489.60

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Solution

The fourth proportional to 126,475.20, 189,712.80 and 63,489.60 is: 95,234.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,475.20 : 189,712.80 = 63,489.60 : x
  2. Step 2: Convert to fraction form
    126,475.20/189,712.80 = 63,489.60/x
  3. Step 3: Cross multiply
    126,475.20x = 189,712.80 × 63,489.60
  4. Step 4: Simplify right side
    126,475.20x = 12,044,789,786.88
  5. Step 5: Solve for x
    x = 12,044,789,786.88/126,475.20
  6. Step 6: Final answer
    x = 95,234.40

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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.