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Finding the Fourth Proportional to 138,898.67, 191,505.92 and 113,379.11

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Solution

The fourth proportional to 138,898.67, 191,505.92 and 113,379.11 is: 156,320.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,898.67 : 191,505.92 = 113,379.11 : x
  2. Step 2: Convert to fraction form
    138,898.67/191,505.92 = 113,379.11/x
  3. Step 3: Cross multiply
    138,898.67x = 191,505.92 × 113,379.11
  4. Step 4: Simplify right side
    138,898.67x = 21,712,769,244.91
  5. Step 5: Solve for x
    x = 21,712,769,244.91/138,898.67
  6. Step 6: Final answer
    x = 156,320.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.