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Finding the Third Proportional to 76.89 and 119.60

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Solution

The third proportional to 76.89 and 119.60 is: 186.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.89 : 119.60 = 119.60 : x
  2. Step 2: Convert to fraction form
    76.89/119.60 = 119.60/x
  3. Step 3: Cross multiply
    76.89x = 119.60 × 119.60
  4. Step 4: Simplify right side
    76.89x = 14,304.53
  5. Step 5: Solve for x
    x = 14,304.53/76.89
  6. Step 6: Final answer
    x = 186.05

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.