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Finding the Third Proportional to 20,216 and 43,720

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Solution

The third proportional to 20,216 and 43,720 is: 94,550.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,216 : 43,720 = 43,720 : x
  2. Step 2: Convert to fraction form
    20,216/43,720 = 43,720/x
  3. Step 3: Cross multiply
    20,216x = 43,720 × 43,720
  4. Step 4: Simplify right side
    20,216x = 1,911,438,400
  5. Step 5: Solve for x
    x = 1,911,438,400/20,216
  6. Step 6: Final answer
    x = 94,550.77

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.