Home / 80,830.38-121,245.78-28,239.85

Finding the Fourth Proportional to 80,830.38, 121,245.78 and 28,239.85

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Solution

The fourth proportional to 80,830.38, 121,245.78 and 28,239.85 is: 42,359.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,830.38 : 121,245.78 = 28,239.85 : x
  2. Step 2: Convert to fraction form
    80,830.38/121,245.78 = 28,239.85/x
  3. Step 3: Cross multiply
    80,830.38x = 121,245.78 × 28,239.85
  4. Step 4: Simplify right side
    80,830.38x = 3,423,962,640.33
  5. Step 5: Solve for x
    x = 3,423,962,640.33/80,830.38
  6. Step 6: Final answer
    x = 42,359.85

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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.