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Finding the Fourth Proportional to 199,906.90, 299,714.55 and 81,517.30

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Solution

The fourth proportional to 199,906.90, 299,714.55 and 81,517.30 is: 122,216.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,906.90 : 299,714.55 = 81,517.30 : x
  2. Step 2: Convert to fraction form
    199,906.90/299,714.55 = 81,517.30/x
  3. Step 3: Cross multiply
    199,906.90x = 299,714.55 × 81,517.30
  4. Step 4: Simplify right side
    199,906.90x = 24,431,920,886.72
  5. Step 5: Solve for x
    x = 24,431,920,886.72/199,906.90
  6. Step 6: Final answer
    x = 122,216.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.