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Finding the Third Proportional to 21,978 and 48,124

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Solution

The third proportional to 21,978 and 48,124 is: 105,374.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,978 : 48,124 = 48,124 : x
  2. Step 2: Convert to fraction form
    21,978/48,124 = 48,124/x
  3. Step 3: Cross multiply
    21,978x = 48,124 × 48,124
  4. Step 4: Simplify right side
    21,978x = 2,315,919,376
  5. Step 5: Solve for x
    x = 2,315,919,376/21,978
  6. Step 6: Final answer
    x = 105,374.44

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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.