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Finding the Fourth Proportional to 137,872.92, 206,174.48 and 131,146.87

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Solution

The fourth proportional to 137,872.92, 206,174.48 and 131,146.87 is: 196,116.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,872.92 : 206,174.48 = 131,146.87 : x
  2. Step 2: Convert to fraction form
    137,872.92/206,174.48 = 131,146.87/x
  3. Step 3: Cross multiply
    137,872.92x = 206,174.48 × 131,146.87
  4. Step 4: Simplify right side
    137,872.92x = 27,039,137,678.99
  5. Step 5: Solve for x
    x = 27,039,137,678.99/137,872.92
  6. Step 6: Final answer
    x = 196,116.37

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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.