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Finding the Third Proportional to 55,540 and 121,887

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Solution

The third proportional to 55,540 and 121,887 is: 267,490.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,540 : 121,887 = 121,887 : x
  2. Step 2: Convert to fraction form
    55,540/121,887 = 121,887/x
  3. Step 3: Cross multiply
    55,540x = 121,887 × 121,887
  4. Step 4: Simplify right side
    55,540x = 14,856,440,769
  5. Step 5: Solve for x
    x = 14,856,440,769/55,540
  6. Step 6: Final answer
    x = 267,490.83

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.