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Finding the Third Proportional to 126,920 and 178,284

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Solution

The third proportional to 126,920 and 178,284 is: 250,434.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,920 : 178,284 = 178,284 : x
  2. Step 2: Convert to fraction form
    126,920/178,284 = 178,284/x
  3. Step 3: Cross multiply
    126,920x = 178,284 × 178,284
  4. Step 4: Simplify right side
    126,920x = 31,785,184,656
  5. Step 5: Solve for x
    x = 31,785,184,656/126,920
  6. Step 6: Final answer
    x = 250,434.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.