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Finding the Fourth Proportional to 66,493.20, 99,772.20 and 50,692.80

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Solution

The fourth proportional to 66,493.20, 99,772.20 and 50,692.80 is: 76,063.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,493.20 : 99,772.20 = 50,692.80 : x
  2. Step 2: Convert to fraction form
    66,493.20/99,772.20 = 50,692.80/x
  3. Step 3: Cross multiply
    66,493.20x = 99,772.20 × 50,692.80
  4. Step 4: Simplify right side
    66,493.20x = 5,057,732,180.16
  5. Step 5: Solve for x
    x = 5,057,732,180.16/66,493.20
  6. Step 6: Final answer
    x = 76,063.90

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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.