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Finding the Fourth Proportional to 126,161.70, 189,092.70 and 66,966.90

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Solution

The fourth proportional to 126,161.70, 189,092.70 and 66,966.90 is: 100,370.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,161.70 : 189,092.70 = 66,966.90 : x
  2. Step 2: Convert to fraction form
    126,161.70/189,092.70 = 66,966.90/x
  3. Step 3: Cross multiply
    126,161.70x = 189,092.70 × 66,966.90
  4. Step 4: Simplify right side
    126,161.70x = 12,662,951,931.63
  5. Step 5: Solve for x
    x = 12,662,951,931.63/126,161.70
  6. Step 6: Final answer
    x = 100,370.81

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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.