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Finding the Third Proportional to 20,005 and 43,780

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Solution

The third proportional to 20,005 and 43,780 is: 95,810.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,005 : 43,780 = 43,780 : x
  2. Step 2: Convert to fraction form
    20,005/43,780 = 43,780/x
  3. Step 3: Cross multiply
    20,005x = 43,780 × 43,780
  4. Step 4: Simplify right side
    20,005x = 1,916,688,400
  5. Step 5: Solve for x
    x = 1,916,688,400/20,005
  6. Step 6: Final answer
    x = 95,810.47

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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.