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Finding the Third Proportional to 27,891 and 43,686

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Solution

The third proportional to 27,891 and 43,686 is: 68,425.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,891 : 43,686 = 43,686 : x
  2. Step 2: Convert to fraction form
    27,891/43,686 = 43,686/x
  3. Step 3: Cross multiply
    27,891x = 43,686 × 43,686
  4. Step 4: Simplify right side
    27,891x = 1,908,466,596
  5. Step 5: Solve for x
    x = 1,908,466,596/27,891
  6. Step 6: Final answer
    x = 68,425.89

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.