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Finding the Third Proportional to 57,282 and 86,031

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Solution

The third proportional to 57,282 and 86,031 is: 129,208.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,282 : 86,031 = 86,031 : x
  2. Step 2: Convert to fraction form
    57,282/86,031 = 86,031/x
  3. Step 3: Cross multiply
    57,282x = 86,031 × 86,031
  4. Step 4: Simplify right side
    57,282x = 7,401,332,961
  5. Step 5: Solve for x
    x = 7,401,332,961/57,282
  6. Step 6: Final answer
    x = 129,208.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.