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Finding the Fourth Proportional to 80,423.40, 120,692.70 and 33,709.80

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Solution

The fourth proportional to 80,423.40, 120,692.70 and 33,709.80 is: 50,588.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,423.40 : 120,692.70 = 33,709.80 : x
  2. Step 2: Convert to fraction form
    80,423.40/120,692.70 = 33,709.80/x
  3. Step 3: Cross multiply
    80,423.40x = 120,692.70 × 33,709.80
  4. Step 4: Simplify right side
    80,423.40x = 4,068,526,778.46
  5. Step 5: Solve for x
    x = 4,068,526,778.46/80,423.40
  6. Step 6: Final answer
    x = 50,588.84

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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.