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Finding the Third Proportional to 85,900 and 129,791

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Solution

The third proportional to 85,900 and 129,791 is: 196,108.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,900 : 129,791 = 129,791 : x
  2. Step 2: Convert to fraction form
    85,900/129,791 = 129,791/x
  3. Step 3: Cross multiply
    85,900x = 129,791 × 129,791
  4. Step 4: Simplify right side
    85,900x = 16,845,703,681
  5. Step 5: Solve for x
    x = 16,845,703,681/85,900
  6. Step 6: Final answer
    x = 196,108.31

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.