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Finding the Third Proportional to 21,913 and 51,217

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Solution

The third proportional to 21,913 and 51,217 is: 119,708.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,913 : 51,217 = 51,217 : x
  2. Step 2: Convert to fraction form
    21,913/51,217 = 51,217/x
  3. Step 3: Cross multiply
    21,913x = 51,217 × 51,217
  4. Step 4: Simplify right side
    21,913x = 2,623,181,089
  5. Step 5: Solve for x
    x = 2,623,181,089/21,913
  6. Step 6: Final answer
    x = 119,708.90

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Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.