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Finding the Fourth Proportional to 72,694.80, 109,074.60 and 33,231.60

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Solution

The fourth proportional to 72,694.80, 109,074.60 and 33,231.60 is: 49,862.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,694.80 : 109,074.60 = 33,231.60 : x
  2. Step 2: Convert to fraction form
    72,694.80/109,074.60 = 33,231.60/x
  3. Step 3: Cross multiply
    72,694.80x = 109,074.60 × 33,231.60
  4. Step 4: Simplify right side
    72,694.80x = 3,624,723,477.36
  5. Step 5: Solve for x
    x = 3,624,723,477.36/72,694.80
  6. Step 6: Final answer
    x = 49,862.21

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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.