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Finding the Third Proportional to 21,910 and 47,106

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Solution

The third proportional to 21,910 and 47,106 is: 101,276.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,910 : 47,106 = 47,106 : x
  2. Step 2: Convert to fraction form
    21,910/47,106 = 47,106/x
  3. Step 3: Cross multiply
    21,910x = 47,106 × 47,106
  4. Step 4: Simplify right side
    21,910x = 2,218,975,236
  5. Step 5: Solve for x
    x = 2,218,975,236/21,910
  6. Step 6: Final answer
    x = 101,276.83

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.