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Finding the Fourth Proportional to 126,174.92, 189,386.91 and 67,010.42

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Solution

The fourth proportional to 126,174.92, 189,386.91 and 67,010.42 is: 100,581.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,174.92 : 189,386.91 = 67,010.42 : x
  2. Step 2: Convert to fraction form
    126,174.92/189,386.91 = 67,010.42/x
  3. Step 3: Cross multiply
    126,174.92x = 189,386.91 × 67,010.42
  4. Step 4: Simplify right side
    126,174.92x = 12,690,896,855.07
  5. Step 5: Solve for x
    x = 12,690,896,855.07/126,174.92
  6. Step 6: Final answer
    x = 100,581.77

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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.