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Finding the Fourth Proportional to 84.62, 126.77 and 61.69

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Solution

The fourth proportional to 84.62, 126.77 and 61.69 is: 92.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.62 : 126.77 = 61.69 : x
  2. Step 2: Convert to fraction form
    84.62/126.77 = 61.69/x
  3. Step 3: Cross multiply
    84.62x = 126.77 × 61.69
  4. Step 4: Simplify right side
    84.62x = 7,820.44
  5. Step 5: Solve for x
    x = 7,820.44/84.62
  6. Step 6: Final answer
    x = 92.42

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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.