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Finding the Fourth Proportional to 71,015.56, 106,523.10 and 39,872.68

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Solution

The fourth proportional to 71,015.56, 106,523.10 and 39,872.68 is: 59,808.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,015.56 : 106,523.10 = 39,872.68 : x
  2. Step 2: Convert to fraction form
    71,015.56/106,523.10 = 39,872.68/x
  3. Step 3: Cross multiply
    71,015.56x = 106,523.10 × 39,872.68
  4. Step 4: Simplify right side
    71,015.56x = 4,247,361,478.91
  5. Step 5: Solve for x
    x = 4,247,361,478.91/71,015.56
  6. Step 6: Final answer
    x = 59,808.89

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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.