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Finding the Third Proportional to 57,789 and 86,436

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Solution

The third proportional to 57,789 and 86,436 is: 129,283.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,789 : 86,436 = 86,436 : x
  2. Step 2: Convert to fraction form
    57,789/86,436 = 86,436/x
  3. Step 3: Cross multiply
    57,789x = 86,436 × 86,436
  4. Step 4: Simplify right side
    57,789x = 7,471,182,096
  5. Step 5: Solve for x
    x = 7,471,182,096/57,789
  6. Step 6: Final answer
    x = 129,283.81

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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.