Home / 80,626.38-120,908.79-28,021.74

Finding the Fourth Proportional to 80,626.38, 120,908.79 and 28,021.74

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Solution

The fourth proportional to 80,626.38, 120,908.79 and 28,021.74 is: 42,021.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,626.38 : 120,908.79 = 28,021.74 : x
  2. Step 2: Convert to fraction form
    80,626.38/120,908.79 = 28,021.74/x
  3. Step 3: Cross multiply
    80,626.38x = 120,908.79 × 28,021.74
  4. Step 4: Simplify right side
    80,626.38x = 3,388,074,677.09
  5. Step 5: Solve for x
    x = 3,388,074,677.09/80,626.38
  6. Step 6: Final answer
    x = 42,021.91

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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.