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Finding the Fourth Proportional to 126,511.86, 189,798.92 and 89,144.88

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Solution

The fourth proportional to 126,511.86, 189,798.92 and 89,144.88 is: 133,739.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,511.86 : 189,798.92 = 89,144.88 : x
  2. Step 2: Convert to fraction form
    126,511.86/189,798.92 = 89,144.88/x
  3. Step 3: Cross multiply
    126,511.86x = 189,798.92 × 89,144.88
  4. Step 4: Simplify right side
    126,511.86x = 16,919,601,947.53
  5. Step 5: Solve for x
    x = 16,919,601,947.53/126,511.86
  6. Step 6: Final answer
    x = 133,739.26

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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.