Home / 259,721.40-389,618.55-82,209.90

Finding the Fourth Proportional to 259,721.40, 389,618.55 and 82,209.90

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Solution

The fourth proportional to 259,721.40, 389,618.55 and 82,209.90 is: 123,326.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,721.40 : 389,618.55 = 82,209.90 : x
  2. Step 2: Convert to fraction form
    259,721.40/389,618.55 = 82,209.90/x
  3. Step 3: Cross multiply
    259,721.40x = 389,618.55 × 82,209.90
  4. Step 4: Simplify right side
    259,721.40x = 32,030,502,033.65
  5. Step 5: Solve for x
    x = 32,030,502,033.65/259,721.40
  6. Step 6: Final answer
    x = 123,326.39

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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.