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Finding the Fourth Proportional to 61,270.70, 91,808.85 and 40,469.90

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Solution

The fourth proportional to 61,270.70, 91,808.85 and 40,469.90 is: 60,640.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,270.70 : 91,808.85 = 40,469.90 : x
  2. Step 2: Convert to fraction form
    61,270.70/91,808.85 = 40,469.90/x
  3. Step 3: Cross multiply
    61,270.70x = 91,808.85 × 40,469.90
  4. Step 4: Simplify right side
    61,270.70x = 3,715,494,978.62
  5. Step 5: Solve for x
    x = 3,715,494,978.62/61,270.70
  6. Step 6: Final answer
    x = 60,640.65

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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.