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Finding the Fourth Proportional to 80,211.98, 120,436.25 and 44,742.60

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Solution

The fourth proportional to 80,211.98, 120,436.25 and 44,742.60 is: 67,179.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,211.98 : 120,436.25 = 44,742.60 : x
  2. Step 2: Convert to fraction form
    80,211.98/120,436.25 = 44,742.60/x
  3. Step 3: Cross multiply
    80,211.98x = 120,436.25 × 44,742.60
  4. Step 4: Simplify right side
    80,211.98x = 5,388,630,959.25
  5. Step 5: Solve for x
    x = 5,388,630,959.25/80,211.98
  6. Step 6: Final answer
    x = 67,179.88

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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.