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Finding the Third Proportional to 90,686 and 127,478

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Solution

The third proportional to 90,686 and 127,478 is: 179,196.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,686 : 127,478 = 127,478 : x
  2. Step 2: Convert to fraction form
    90,686/127,478 = 127,478/x
  3. Step 3: Cross multiply
    90,686x = 127,478 × 127,478
  4. Step 4: Simplify right side
    90,686x = 16,250,640,484
  5. Step 5: Solve for x
    x = 16,250,640,484/90,686
  6. Step 6: Final answer
    x = 179,196.79

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.