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Finding the Third Proportional to 121.25 and 188

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Solution

The third proportional to 121.25 and 188 is: 291.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.25 : 188 = 188 : x
  2. Step 2: Convert to fraction form
    121.25/188 = 188/x
  3. Step 3: Cross multiply
    121.25x = 188 × 188
  4. Step 4: Simplify right side
    121.25x = 35,344
  5. Step 5: Solve for x
    x = 35,344/121.25
  6. Step 6: Final answer
    x = 291.50

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.