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Finding the Third Proportional to 76,991 and 165,087

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Solution

The third proportional to 76,991 and 165,087 is: 353,985.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,991 : 165,087 = 165,087 : x
  2. Step 2: Convert to fraction form
    76,991/165,087 = 165,087/x
  3. Step 3: Cross multiply
    76,991x = 165,087 × 165,087
  4. Step 4: Simplify right side
    76,991x = 27,253,717,569
  5. Step 5: Solve for x
    x = 27,253,717,569/76,991
  6. Step 6: Final answer
    x = 353,985.76

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.