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Finding the Fourth Proportional to 80,379.02, 120,543.90 and 55,578.44

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Solution

The fourth proportional to 80,379.02, 120,543.90 and 55,578.44 is: 83,350.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,379.02 : 120,543.90 = 55,578.44 : x
  2. Step 2: Convert to fraction form
    80,379.02/120,543.90 = 55,578.44/x
  3. Step 3: Cross multiply
    80,379.02x = 120,543.90 × 55,578.44
  4. Step 4: Simplify right side
    80,379.02x = 6,699,642,214.88
  5. Step 5: Solve for x
    x = 6,699,642,214.88/80,379.02
  6. Step 6: Final answer
    x = 83,350.63

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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.