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Finding the Third Proportional to 98.24 and 129.57

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Solution

The third proportional to 98.24 and 129.57 is: 170.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.24 : 129.57 = 129.57 : x
  2. Step 2: Convert to fraction form
    98.24/129.57 = 129.57/x
  3. Step 3: Cross multiply
    98.24x = 129.57 × 129.57
  4. Step 4: Simplify right side
    98.24x = 16,787.96
  5. Step 5: Solve for x
    x = 16,787.96/98.24
  6. Step 6: Final answer
    x = 170.88

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.