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Finding the Third Proportional to 129,987,200.25 and 285,479,680.50

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Solution

The third proportional to 129,987,200.25 and 285,479,680.50 is: 626,974,408.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,987,200.25 : 285,479,680.50 = 285,479,680.50 : x
  2. Step 2: Convert to fraction form
    129,987,200.25/285,479,680.50 = 285,479,680.50/x
  3. Step 3: Cross multiply
    129,987,200.25x = 285,479,680.50 × 285,479,680.50
  4. Step 4: Simplify right side
    129,987,200.25x = 81,498,647,978,382,080
  5. Step 5: Solve for x
    x = 81,498,647,978,382,080/129,987,200.25
  6. Step 6: Final answer
    x = 626,974,408.42

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.