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Finding the Third Proportional to 76,708 and 122,109

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Solution

The third proportional to 76,708 and 122,109 is: 194,381.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,708 : 122,109 = 122,109 : x
  2. Step 2: Convert to fraction form
    76,708/122,109 = 122,109/x
  3. Step 3: Cross multiply
    76,708x = 122,109 × 122,109
  4. Step 4: Simplify right side
    76,708x = 14,910,607,881
  5. Step 5: Solve for x
    x = 14,910,607,881/76,708
  6. Step 6: Final answer
    x = 194,381.39

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.