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Finding the Fourth Proportional to 71,911.91, 107,916.46 and 25,165.19

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Solution

The fourth proportional to 71,911.91, 107,916.46 and 25,165.19 is: 37,764.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,911.91 : 107,916.46 = 25,165.19 : x
  2. Step 2: Convert to fraction form
    71,911.91/107,916.46 = 25,165.19/x
  3. Step 3: Cross multiply
    71,911.91x = 107,916.46 × 25,165.19
  4. Step 4: Simplify right side
    71,911.91x = 2,715,737,680.45
  5. Step 5: Solve for x
    x = 2,715,737,680.45/71,911.91
  6. Step 6: Final answer
    x = 37,764.79

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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.