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Finding the Third Proportional to 48.75 and 61.13

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Solution

The third proportional to 48.75 and 61.13 is: 76.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.75 : 61.13 = 61.13 : x
  2. Step 2: Convert to fraction form
    48.75/61.13 = 61.13/x
  3. Step 3: Cross multiply
    48.75x = 61.13 × 61.13
  4. Step 4: Simplify right side
    48.75x = 3,736.27
  5. Step 5: Solve for x
    x = 3,736.27/48.75
  6. Step 6: Final answer
    x = 76.64

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Why These Related Problems?

These problems maintain the same ratio (1.25) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.