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Finding the Third Proportional to 21,396,768 and 41,721,418

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Solution

The third proportional to 21,396,768 and 41,721,418 is: 81,352,320.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,396,768 : 41,721,418 = 41,721,418 : x
  2. Step 2: Convert to fraction form
    21,396,768/41,721,418 = 41,721,418/x
  3. Step 3: Cross multiply
    21,396,768x = 41,721,418 × 41,721,418
  4. Step 4: Simplify right side
    21,396,768x = 1,740,676,719,930,724
  5. Step 5: Solve for x
    x = 1,740,676,719,930,724/21,396,768
  6. Step 6: Final answer
    x = 81,352,320.12

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Why These Related Problems?

These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.