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Finding the Third Proportional to 99,864 and 218,154

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Solution

The third proportional to 99,864 and 218,154 is: 476,559.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,864 : 218,154 = 218,154 : x
  2. Step 2: Convert to fraction form
    99,864/218,154 = 218,154/x
  3. Step 3: Cross multiply
    99,864x = 218,154 × 218,154
  4. Step 4: Simplify right side
    99,864x = 47,591,167,716
  5. Step 5: Solve for x
    x = 47,591,167,716/99,864
  6. Step 6: Final answer
    x = 476,559.80

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.