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Finding the Third Proportional to 76.99 and 104.06

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Solution

The third proportional to 76.99 and 104.06 is: 140.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.99 : 104.06 = 104.06 : x
  2. Step 2: Convert to fraction form
    76.99/104.06 = 104.06/x
  3. Step 3: Cross multiply
    76.99x = 104.06 × 104.06
  4. Step 4: Simplify right side
    76.99x = 10,829.00
  5. Step 5: Solve for x
    x = 10,829.00/76.99
  6. Step 6: Final answer
    x = 140.65

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.