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Finding the Fourth Proportional to 69.82, 95.84 and 61.88

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Solution

The fourth proportional to 69.82, 95.84 and 61.88 is: 84.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.82 : 95.84 = 61.88 : x
  2. Step 2: Convert to fraction form
    69.82/95.84 = 61.88/x
  3. Step 3: Cross multiply
    69.82x = 95.84 × 61.88
  4. Step 4: Simplify right side
    69.82x = 5,930.26
  5. Step 5: Solve for x
    x = 5,930.26/69.82
  6. Step 6: Final answer
    x = 84.93

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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.