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Finding the Fourth Proportional to 61.12, 84.87 and 59.65

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Solution

The fourth proportional to 61.12, 84.87 and 59.65 is: 82.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.12 : 84.87 = 59.65 : x
  2. Step 2: Convert to fraction form
    61.12/84.87 = 59.65/x
  3. Step 3: Cross multiply
    61.12x = 84.87 × 59.65
  4. Step 4: Simplify right side
    61.12x = 5,062.20
  5. Step 5: Solve for x
    x = 5,062.20/61.12
  6. Step 6: Final answer
    x = 82.82

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.