Home / 206,986.17-309,860.42-126,771.57

Finding the Fourth Proportional to 206,986.17, 309,860.42 and 126,771.57

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Solution

The fourth proportional to 206,986.17, 309,860.42 and 126,771.57 is: 189,778.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,986.17 : 309,860.42 = 126,771.57 : x
  2. Step 2: Convert to fraction form
    206,986.17/309,860.42 = 126,771.57/x
  3. Step 3: Cross multiply
    206,986.17x = 309,860.42 × 126,771.57
  4. Step 4: Simplify right side
    206,986.17x = 39,281,491,924.26
  5. Step 5: Solve for x
    x = 39,281,491,924.26/206,986.17
  6. Step 6: Final answer
    x = 189,778.34

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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.