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Finding the Third Proportional to 18.75 and 49.25

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Solution

The third proportional to 18.75 and 49.25 is: 129.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.75 : 49.25 = 49.25 : x
  2. Step 2: Convert to fraction form
    18.75/49.25 = 49.25/x
  3. Step 3: Cross multiply
    18.75x = 49.25 × 49.25
  4. Step 4: Simplify right side
    18.75x = 2,425.56
  5. Step 5: Solve for x
    x = 2,425.56/18.75
  6. Step 6: Final answer
    x = 129.36

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Why These Related Problems?

These problems maintain the same ratio (2.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.