Home / 259,782.12-389,785.43-139,698.71

Finding the Fourth Proportional to 259,782.12, 389,785.43 and 139,698.71

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Solution

The fourth proportional to 259,782.12, 389,785.43 and 139,698.71 is: 209,608.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,782.12 : 389,785.43 = 139,698.71 : x
  2. Step 2: Convert to fraction form
    259,782.12/389,785.43 = 139,698.71/x
  3. Step 3: Cross multiply
    259,782.12x = 389,785.43 × 139,698.71
  4. Step 4: Simplify right side
    259,782.12x = 54,452,521,747.80
  5. Step 5: Solve for x
    x = 54,452,521,747.80/259,782.12
  6. Step 6: Final answer
    x = 209,608.43

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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.