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Finding the Fourth Proportional to 61.11, 83.60 and 60.85

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Solution

The fourth proportional to 61.11, 83.60 and 60.85 is: 83.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.11 : 83.60 = 60.85 : x
  2. Step 2: Convert to fraction form
    61.11/83.60 = 60.85/x
  3. Step 3: Cross multiply
    61.11x = 83.60 × 60.85
  4. Step 4: Simplify right side
    61.11x = 5,086.55
  5. Step 5: Solve for x
    x = 5,086.55/61.11
  6. Step 6: Final answer
    x = 83.24

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.