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Finding the Fourth Proportional to 121,797.60, 182,692.56 and 72,217.44

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Solution

The fourth proportional to 121,797.60, 182,692.56 and 72,217.44 is: 108,323.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,797.60 : 182,692.56 = 72,217.44 : x
  2. Step 2: Convert to fraction form
    121,797.60/182,692.56 = 72,217.44/x
  3. Step 3: Cross multiply
    121,797.60x = 182,692.56 × 72,217.44
  4. Step 4: Simplify right side
    121,797.60x = 13,193,588,990.25
  5. Step 5: Solve for x
    x = 13,193,588,990.25/121,797.60
  6. Step 6: Final answer
    x = 108,323.88

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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.