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Finding the Third Proportional to 56,487 and 122,811

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Solution

The third proportional to 56,487 and 122,811 is: 267,009.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,487 : 122,811 = 122,811 : x
  2. Step 2: Convert to fraction form
    56,487/122,811 = 122,811/x
  3. Step 3: Cross multiply
    56,487x = 122,811 × 122,811
  4. Step 4: Simplify right side
    56,487x = 15,082,541,721
  5. Step 5: Solve for x
    x = 15,082,541,721/56,487
  6. Step 6: Final answer
    x = 267,009.08

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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.