Home / 206,234.80-309,640.20-131,815.60

Finding the Fourth Proportional to 206,234.80, 309,640.20 and 131,815.60

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Solution

The fourth proportional to 206,234.80, 309,640.20 and 131,815.60 is: 197,907.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,234.80 : 309,640.20 = 131,815.60 : x
  2. Step 2: Convert to fraction form
    206,234.80/309,640.20 = 131,815.60/x
  3. Step 3: Cross multiply
    206,234.80x = 309,640.20 × 131,815.60
  4. Step 4: Simplify right side
    206,234.80x = 40,815,408,747.12
  5. Step 5: Solve for x
    x = 40,815,408,747.12/206,234.80
  6. Step 6: Final answer
    x = 197,907.48

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1.5x scale

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.