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Finding the Third Proportional to 21,120 and 48,792

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Solution

The third proportional to 21,120 and 48,792 is: 112,720.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120 : 48,792 = 48,792 : x
  2. Step 2: Convert to fraction form
    21,120/48,792 = 48,792/x
  3. Step 3: Cross multiply
    21,120x = 48,792 × 48,792
  4. Step 4: Simplify right side
    21,120x = 2,380,659,264
  5. Step 5: Solve for x
    x = 2,380,659,264/21,120
  6. Step 6: Final answer
    x = 112,720.61

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.