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Finding the Fourth Proportional to 80,611.96, 120,919.02 and 28,022.44

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Solution

The fourth proportional to 80,611.96, 120,919.02 and 28,022.44 is: 42,034.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,611.96 : 120,919.02 = 28,022.44 : x
  2. Step 2: Convert to fraction form
    80,611.96/120,919.02 = 28,022.44/x
  3. Step 3: Cross multiply
    80,611.96x = 120,919.02 × 28,022.44
  4. Step 4: Simplify right side
    80,611.96x = 3,388,445,982.81
  5. Step 5: Solve for x
    x = 3,388,445,982.81/80,611.96
  6. Step 6: Final answer
    x = 42,034.04

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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.