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Finding the Third Proportional to 55,422 and 120,324

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Solution

The third proportional to 55,422 and 120,324 is: 261,229.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,422 : 120,324 = 120,324 : x
  2. Step 2: Convert to fraction form
    55,422/120,324 = 120,324/x
  3. Step 3: Cross multiply
    55,422x = 120,324 × 120,324
  4. Step 4: Simplify right side
    55,422x = 14,477,864,976
  5. Step 5: Solve for x
    x = 14,477,864,976/55,422
  6. Step 6: Final answer
    x = 261,229.57

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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.