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Finding the Fourth Proportional to 70,620.36, 105,879.21 and 33,161.14

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Solution

The fourth proportional to 70,620.36, 105,879.21 and 33,161.14 is: 49,717.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,620.36 : 105,879.21 = 33,161.14 : x
  2. Step 2: Convert to fraction form
    70,620.36/105,879.21 = 33,161.14/x
  3. Step 3: Cross multiply
    70,620.36x = 105,879.21 × 33,161.14
  4. Step 4: Simplify right side
    70,620.36x = 3,511,075,305.90
  5. Step 5: Solve for x
    x = 3,511,075,305.90/70,620.36
  6. Step 6: Final answer
    x = 49,717.61

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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.