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Finding the Fourth Proportional to 66,190.80, 99,043.20 and 48,694.80

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Solution

The fourth proportional to 66,190.80, 99,043.20 and 48,694.80 is: 72,863.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,190.80 : 99,043.20 = 48,694.80 : x
  2. Step 2: Convert to fraction form
    66,190.80/99,043.20 = 48,694.80/x
  3. Step 3: Cross multiply
    66,190.80x = 99,043.20 × 48,694.80
  4. Step 4: Simplify right side
    66,190.80x = 4,822,888,815.36
  5. Step 5: Solve for x
    x = 4,822,888,815.36/66,190.80
  6. Step 6: Final answer
    x = 72,863.43

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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.