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Finding the Third Proportional to 55,422 and 121,212

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Solution

The third proportional to 55,422 and 121,212 is: 265,099.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,422 : 121,212 = 121,212 : x
  2. Step 2: Convert to fraction form
    55,422/121,212 = 121,212/x
  3. Step 3: Cross multiply
    55,422x = 121,212 × 121,212
  4. Step 4: Simplify right side
    55,422x = 14,692,348,944
  5. Step 5: Solve for x
    x = 14,692,348,944/55,422
  6. Step 6: Final answer
    x = 265,099.58

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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.