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Finding the Third Proportional to 78,194 and 129,422

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Solution

The third proportional to 78,194 and 129,422 is: 214,211.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,194 : 129,422 = 129,422 : x
  2. Step 2: Convert to fraction form
    78,194/129,422 = 129,422/x
  3. Step 3: Cross multiply
    78,194x = 129,422 × 129,422
  4. Step 4: Simplify right side
    78,194x = 16,750,054,084
  5. Step 5: Solve for x
    x = 16,750,054,084/78,194
  6. Step 6: Final answer
    x = 214,211.50

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Why These Related Problems?

These problems maintain the same ratio (1.66) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.