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Finding the Third Proportional to 61.75 and 108.50

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Solution

The third proportional to 61.75 and 108.50 is: 190.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.75 : 108.50 = 108.50 : x
  2. Step 2: Convert to fraction form
    61.75/108.50 = 108.50/x
  3. Step 3: Cross multiply
    61.75x = 108.50 × 108.50
  4. Step 4: Simplify right side
    61.75x = 11,772.25
  5. Step 5: Solve for x
    x = 11,772.25/61.75
  6. Step 6: Final answer
    x = 190.64

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Why These Related Problems?

These problems maintain the same ratio (1.76) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.