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Finding the Fourth Proportional to 126,640.73, 189,793.67 and 66,546.42

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Solution

The fourth proportional to 126,640.73, 189,793.67 and 66,546.42 is: 99,731.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,640.73 : 189,793.67 = 66,546.42 : x
  2. Step 2: Convert to fraction form
    126,640.73/189,793.67 = 66,546.42/x
  3. Step 3: Cross multiply
    126,640.73x = 189,793.67 × 66,546.42
  4. Step 4: Simplify right side
    126,640.73x = 12,630,088,944.43
  5. Step 5: Solve for x
    x = 12,630,088,944.43/126,640.73
  6. Step 6: Final answer
    x = 99,731.65

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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.