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Finding the Third Proportional to 56,220 and 122,800

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Solution

The third proportional to 56,220 and 122,800 is: 268,229.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,220 : 122,800 = 122,800 : x
  2. Step 2: Convert to fraction form
    56,220/122,800 = 122,800/x
  3. Step 3: Cross multiply
    56,220x = 122,800 × 122,800
  4. Step 4: Simplify right side
    56,220x = 15,079,840,000
  5. Step 5: Solve for x
    x = 15,079,840,000/56,220
  6. Step 6: Final answer
    x = 268,229.10

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.