Home / 80,379.11-120,544.04-55,578.53

Finding the Fourth Proportional to 80,379.11, 120,544.04 and 55,578.53

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Solution

The fourth proportional to 80,379.11, 120,544.04 and 55,578.53 is: 83,350.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,379.11 : 120,544.04 = 55,578.53 : x
  2. Step 2: Convert to fraction form
    80,379.11/120,544.04 = 55,578.53/x
  3. Step 3: Cross multiply
    80,379.11x = 120,544.04 × 55,578.53
  4. Step 4: Simplify right side
    80,379.11x = 6,699,660,983.77
  5. Step 5: Solve for x
    x = 6,699,660,983.77/80,379.11
  6. Step 6: Final answer
    x = 83,350.77

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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.