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Finding the Third Proportional to 61.50 and 121.13

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Solution

The third proportional to 61.50 and 121.13 is: 238.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.50 : 121.13 = 121.13 : x
  2. Step 2: Convert to fraction form
    61.50/121.13 = 121.13/x
  3. Step 3: Cross multiply
    61.50x = 121.13 × 121.13
  4. Step 4: Simplify right side
    61.50x = 14,671.27
  5. Step 5: Solve for x
    x = 14,671.27/61.50
  6. Step 6: Final answer
    x = 238.56

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Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.