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Finding the Third Proportional to 121.75 and 193.69

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Solution

The third proportional to 121.75 and 193.69 is: 308.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.75 : 193.69 = 193.69 : x
  2. Step 2: Convert to fraction form
    121.75/193.69 = 193.69/x
  3. Step 3: Cross multiply
    121.75x = 193.69 × 193.69
  4. Step 4: Simplify right side
    121.75x = 37,514.85
  5. Step 5: Solve for x
    x = 37,514.85/121.75
  6. Step 6: Final answer
    x = 308.13

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.