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Finding the Third Proportional to 60.75 and 86.91

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Solution

The third proportional to 60.75 and 86.91 is: 124.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.75 : 86.91 = 86.91 : x
  2. Step 2: Convert to fraction form
    60.75/86.91 = 86.91/x
  3. Step 3: Cross multiply
    60.75x = 86.91 × 86.91
  4. Step 4: Simplify right side
    60.75x = 7,552.70
  5. Step 5: Solve for x
    x = 7,552.70/60.75
  6. Step 6: Final answer
    x = 124.32

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.