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Finding the Third Proportional to 100,836 and 214,920

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Solution

The third proportional to 100,836 and 214,920 is: 458,076.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,836 : 214,920 = 214,920 : x
  2. Step 2: Convert to fraction form
    100,836/214,920 = 214,920/x
  3. Step 3: Cross multiply
    100,836x = 214,920 × 214,920
  4. Step 4: Simplify right side
    100,836x = 46,190,606,400
  5. Step 5: Solve for x
    x = 46,190,606,400/100,836
  6. Step 6: Final answer
    x = 458,076.54

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.