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Finding the Fourth Proportional to 72,609.80, 108,768.90 and 41,408.60

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Solution

The fourth proportional to 72,609.80, 108,768.90 and 41,408.60 is: 62,029.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,609.80 : 108,768.90 = 41,408.60 : x
  2. Step 2: Convert to fraction form
    72,609.80/108,768.90 = 41,408.60/x
  3. Step 3: Cross multiply
    72,609.80x = 108,768.90 × 41,408.60
  4. Step 4: Simplify right side
    72,609.80x = 4,503,967,872.54
  5. Step 5: Solve for x
    x = 4,503,967,872.54/72,609.80
  6. Step 6: Final answer
    x = 62,029.75

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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.