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Finding the Third Proportional to 100,120 and 218,812

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Solution

The third proportional to 100,120 and 218,812 is: 478,213.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,120 : 218,812 = 218,812 : x
  2. Step 2: Convert to fraction form
    100,120/218,812 = 218,812/x
  3. Step 3: Cross multiply
    100,120x = 218,812 × 218,812
  4. Step 4: Simplify right side
    100,120x = 47,878,691,344
  5. Step 5: Solve for x
    x = 47,878,691,344/100,120
  6. Step 6: Final answer
    x = 478,213.06

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1.5x scale

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.