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Finding the Third Proportional to 26,690 and 61,781

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Solution

The third proportional to 26,690 and 61,781 is: 143,008.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,690 : 61,781 = 61,781 : x
  2. Step 2: Convert to fraction form
    26,690/61,781 = 61,781/x
  3. Step 3: Cross multiply
    26,690x = 61,781 × 61,781
  4. Step 4: Simplify right side
    26,690x = 3,816,891,961
  5. Step 5: Solve for x
    x = 3,816,891,961/26,690
  6. Step 6: Final answer
    x = 143,008.32

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.