Home / 259,911.42-389,648.43-126,723.12

Finding the Fourth Proportional to 259,911.42, 389,648.43 and 126,723.12

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Solution

The fourth proportional to 259,911.42, 389,648.43 and 126,723.12 is: 189,978.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,911.42 : 389,648.43 = 126,723.12 : x
  2. Step 2: Convert to fraction form
    259,911.42/389,648.43 = 126,723.12/x
  3. Step 3: Cross multiply
    259,911.42x = 389,648.43 × 126,723.12
  4. Step 4: Simplify right side
    259,911.42x = 49,377,464,752.70
  5. Step 5: Solve for x
    x = 49,377,464,752.70/259,911.42
  6. Step 6: Final answer
    x = 189,978.05

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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.