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Finding the Third Proportional to 55,790 and 122,638

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Solution

The third proportional to 55,790 and 122,638 is: 269,583.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,790 : 122,638 = 122,638 : x
  2. Step 2: Convert to fraction form
    55,790/122,638 = 122,638/x
  3. Step 3: Cross multiply
    55,790x = 122,638 × 122,638
  4. Step 4: Simplify right side
    55,790x = 15,040,079,044
  5. Step 5: Solve for x
    x = 15,040,079,044/55,790
  6. Step 6: Final answer
    x = 269,583.78

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.