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Finding the Third Proportional to 56,491 and 122,820

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Solution

The third proportional to 56,491 and 122,820 is: 267,029.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,491 : 122,820 = 122,820 : x
  2. Step 2: Convert to fraction form
    56,491/122,820 = 122,820/x
  3. Step 3: Cross multiply
    56,491x = 122,820 × 122,820
  4. Step 4: Simplify right side
    56,491x = 15,084,752,400
  5. Step 5: Solve for x
    x = 15,084,752,400/56,491
  6. Step 6: Final answer
    x = 267,029.30

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.