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Finding the Fourth Proportional to 71,408.20, 107,112.30 and 41,859.40

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Solution

The fourth proportional to 71,408.20, 107,112.30 and 41,859.40 is: 62,789.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,408.20 : 107,112.30 = 41,859.40 : x
  2. Step 2: Convert to fraction form
    71,408.20/107,112.30 = 41,859.40/x
  3. Step 3: Cross multiply
    71,408.20x = 107,112.30 × 41,859.40
  4. Step 4: Simplify right side
    71,408.20x = 4,483,656,610.62
  5. Step 5: Solve for x
    x = 4,483,656,610.62/71,408.20
  6. Step 6: Final answer
    x = 62,789.10

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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.