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Finding the Fourth Proportional to 84.62, 126.90 and 36.53

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Solution

The fourth proportional to 84.62, 126.90 and 36.53 is: 54.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.62 : 126.90 = 36.53 : x
  2. Step 2: Convert to fraction form
    84.62/126.90 = 36.53/x
  3. Step 3: Cross multiply
    84.62x = 126.90 × 36.53
  4. Step 4: Simplify right side
    84.62x = 4,635.02
  5. Step 5: Solve for x
    x = 4,635.02/84.62
  6. Step 6: Final answer
    x = 54.78

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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.