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Finding the Fourth Proportional to 421,481.52, 632,223.72 and 105,936.48

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Solution

The fourth proportional to 421,481.52, 632,223.72 and 105,936.48 is: 158,905.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,481.52 : 632,223.72 = 105,936.48 : x
  2. Step 2: Convert to fraction form
    421,481.52/632,223.72 = 105,936.48/x
  3. Step 3: Cross multiply
    421,481.52x = 632,223.72 × 105,936.48
  4. Step 4: Simplify right side
    421,481.52x = 66,975,555,469.31
  5. Step 5: Solve for x
    x = 66,975,555,469.31/421,481.52
  6. Step 6: Final answer
    x = 158,905.08

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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.