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Finding the Third Proportional to 121.13 and 180.38

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Solution

The third proportional to 121.13 and 180.38 is: 268.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.13 : 180.38 = 180.38 : x
  2. Step 2: Convert to fraction form
    121.13/180.38 = 180.38/x
  3. Step 3: Cross multiply
    121.13x = 180.38 × 180.38
  4. Step 4: Simplify right side
    121.13x = 32,535.14
  5. Step 5: Solve for x
    x = 32,535.14/121.13
  6. Step 6: Final answer
    x = 268.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.