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Finding the Third Proportional to 84.53 and 129.36

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Solution

The third proportional to 84.53 and 129.36 is: 197.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.53 : 129.36 = 129.36 : x
  2. Step 2: Convert to fraction form
    84.53/129.36 = 129.36/x
  3. Step 3: Cross multiply
    84.53x = 129.36 × 129.36
  4. Step 4: Simplify right side
    84.53x = 16,733.85
  5. Step 5: Solve for x
    x = 16,733.85/84.53
  6. Step 6: Final answer
    x = 197.96

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.