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Finding the Third Proportional to 20,128 and 40,328

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Solution

The third proportional to 20,128 and 40,328 is: 80,800.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128 : 40,328 = 40,328 : x
  2. Step 2: Convert to fraction form
    20,128/40,328 = 40,328/x
  3. Step 3: Cross multiply
    20,128x = 40,328 × 40,328
  4. Step 4: Simplify right side
    20,128x = 1,626,347,584
  5. Step 5: Solve for x
    x = 1,626,347,584/20,128
  6. Step 6: Final answer
    x = 80,800.26

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Why These Related Problems?

These problems maintain the same ratio (2.00) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.