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Finding the Fourth Proportional to 74,640.80, 111,961.20 and 22,050.80

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Solution

The fourth proportional to 74,640.80, 111,961.20 and 22,050.80 is: 33,076.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,640.80 : 111,961.20 = 22,050.80 : x
  2. Step 2: Convert to fraction form
    74,640.80/111,961.20 = 22,050.80/x
  3. Step 3: Cross multiply
    74,640.80x = 111,961.20 × 22,050.80
  4. Step 4: Simplify right side
    74,640.80x = 2,468,834,028.96
  5. Step 5: Solve for x
    x = 2,468,834,028.96/74,640.80
  6. Step 6: Final answer
    x = 33,076.20

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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.