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Finding the Third Proportional to 77,081 and 115,099

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Solution

The third proportional to 77,081 and 115,099 is: 171,868.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,081 : 115,099 = 115,099 : x
  2. Step 2: Convert to fraction form
    77,081/115,099 = 115,099/x
  3. Step 3: Cross multiply
    77,081x = 115,099 × 115,099
  4. Step 4: Simplify right side
    77,081x = 13,247,779,801
  5. Step 5: Solve for x
    x = 13,247,779,801/77,081
  6. Step 6: Final answer
    x = 171,868.29

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.