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Finding the Fourth Proportional to 168,509.50, 252,958.66 and 85,578.46

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Solution

The fourth proportional to 168,509.50, 252,958.66 and 85,578.46 is: 128,466.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,509.50 : 252,958.66 = 85,578.46 : x
  2. Step 2: Convert to fraction form
    168,509.50/252,958.66 = 85,578.46/x
  3. Step 3: Cross multiply
    168,509.50x = 252,958.66 × 85,578.46
  4. Step 4: Simplify right side
    168,509.50x = 21,647,812,566.46
  5. Step 5: Solve for x
    x = 21,647,812,566.46/168,509.50
  6. Step 6: Final answer
    x = 128,466.42

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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.