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Finding the Third Proportional to 21,900 and 47,999

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Solution

The third proportional to 21,900 and 47,999 is: 105,201.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,900 : 47,999 = 47,999 : x
  2. Step 2: Convert to fraction form
    21,900/47,999 = 47,999/x
  3. Step 3: Cross multiply
    21,900x = 47,999 × 47,999
  4. Step 4: Simplify right side
    21,900x = 2,303,904,001
  5. Step 5: Solve for x
    x = 2,303,904,001/21,900
  6. Step 6: Final answer
    x = 105,201.10

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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.