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Finding the Third Proportional to 57,427 and 121,811

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Solution

The third proportional to 57,427 and 121,811 is: 258,378.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,427 : 121,811 = 121,811 : x
  2. Step 2: Convert to fraction form
    57,427/121,811 = 121,811/x
  3. Step 3: Cross multiply
    57,427x = 121,811 × 121,811
  4. Step 4: Simplify right side
    57,427x = 14,837,919,721
  5. Step 5: Solve for x
    x = 14,837,919,721/57,427
  6. Step 6: Final answer
    x = 258,378.81

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.