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Finding the Fourth Proportional to 192,716.54, 288,908.68 and 74,470.85

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Solution

The fourth proportional to 192,716.54, 288,908.68 and 74,470.85 is: 111,642.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,716.54 : 288,908.68 = 74,470.85 : x
  2. Step 2: Convert to fraction form
    192,716.54/288,908.68 = 74,470.85/x
  3. Step 3: Cross multiply
    192,716.54x = 288,908.68 × 74,470.85
  4. Step 4: Simplify right side
    192,716.54x = 21,515,274,971.98
  5. Step 5: Solve for x
    x = 21,515,274,971.98/192,716.54
  6. Step 6: Final answer
    x = 111,642.08

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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.