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Finding the Fourth Proportional to 71,273.96, 106,902.72 and 18,687.62

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Solution

The fourth proportional to 71,273.96, 106,902.72 and 18,687.62 is: 28,029.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,273.96 : 106,902.72 = 18,687.62 : x
  2. Step 2: Convert to fraction form
    71,273.96/106,902.72 = 18,687.62/x
  3. Step 3: Cross multiply
    71,273.96x = 106,902.72 × 18,687.62
  4. Step 4: Simplify right side
    71,273.96x = 1,997,757,408.33
  5. Step 5: Solve for x
    x = 1,997,757,408.33/71,273.96
  6. Step 6: Final answer
    x = 28,029.27

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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.