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Finding the Fourth Proportional to 74,231.20, 111,217.20 and 63,863.20

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Solution

The fourth proportional to 74,231.20, 111,217.20 and 63,863.20 is: 95,683.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,231.20 : 111,217.20 = 63,863.20 : x
  2. Step 2: Convert to fraction form
    74,231.20/111,217.20 = 63,863.20/x
  3. Step 3: Cross multiply
    74,231.20x = 111,217.20 × 63,863.20
  4. Step 4: Simplify right side
    74,231.20x = 7,102,686,287.04
  5. Step 5: Solve for x
    x = 7,102,686,287.04/74,231.20
  6. Step 6: Final answer
    x = 95,683.30

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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.