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Finding the Fourth Proportional to 61.68, 84.60 and 59.69

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Solution

The fourth proportional to 61.68, 84.60 and 59.69 is: 81.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.68 : 84.60 = 59.69 : x
  2. Step 2: Convert to fraction form
    61.68/84.60 = 59.69/x
  3. Step 3: Cross multiply
    61.68x = 84.60 × 59.69
  4. Step 4: Simplify right side
    61.68x = 5,049.77
  5. Step 5: Solve for x
    x = 5,049.77/61.68
  6. Step 6: Final answer
    x = 81.87

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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.