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Finding the Third Proportional to 76.13 and 119.30

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Solution

The third proportional to 76.13 and 119.30 is: 186.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.13 : 119.30 = 119.30 : x
  2. Step 2: Convert to fraction form
    76.13/119.30 = 119.30/x
  3. Step 3: Cross multiply
    76.13x = 119.30 × 119.30
  4. Step 4: Simplify right side
    76.13x = 14,231.74
  5. Step 5: Solve for x
    x = 14,231.74/76.13
  6. Step 6: Final answer
    x = 186.95

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.