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Finding the Fourth Proportional to 71,391.70, 107,047.05 and 27,019.90

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Solution

The fourth proportional to 71,391.70, 107,047.05 and 27,019.90 is: 40,514.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,391.70 : 107,047.05 = 27,019.90 : x
  2. Step 2: Convert to fraction form
    71,391.70/107,047.05 = 27,019.90/x
  3. Step 3: Cross multiply
    71,391.70x = 107,047.05 × 27,019.90
  4. Step 4: Simplify right side
    71,391.70x = 2,892,400,586.30
  5. Step 5: Solve for x
    x = 2,892,400,586.30/71,391.70
  6. Step 6: Final answer
    x = 40,514.52

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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.