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Finding the Third Proportional to 38,690 and 57,891

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Solution

The third proportional to 38,690 and 57,891 is: 86,621.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,690 : 57,891 = 57,891 : x
  2. Step 2: Convert to fraction form
    38,690/57,891 = 57,891/x
  3. Step 3: Cross multiply
    38,690x = 57,891 × 57,891
  4. Step 4: Simplify right side
    38,690x = 3,351,367,881
  5. Step 5: Solve for x
    x = 3,351,367,881/38,690
  6. Step 6: Final answer
    x = 86,621.04

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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.