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Finding the Third Proportional to 57,128 and 87,864

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Solution

The third proportional to 57,128 and 87,864 is: 135,136.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,128 : 87,864 = 87,864 : x
  2. Step 2: Convert to fraction form
    57,128/87,864 = 87,864/x
  3. Step 3: Cross multiply
    57,128x = 87,864 × 87,864
  4. Step 4: Simplify right side
    57,128x = 7,720,082,496
  5. Step 5: Solve for x
    x = 7,720,082,496/57,128
  6. Step 6: Final answer
    x = 135,136.58

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.