Home / 259,031.31-388,527.99-81,589.06

Finding the Fourth Proportional to 259,031.31, 388,527.99 and 81,589.06

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Solution

The fourth proportional to 259,031.31, 388,527.99 and 81,589.06 is: 122,377.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,031.31 : 388,527.99 = 81,589.06 : x
  2. Step 2: Convert to fraction form
    259,031.31/388,527.99 = 81,589.06/x
  3. Step 3: Cross multiply
    259,031.31x = 388,527.99 × 81,589.06
  4. Step 4: Simplify right side
    259,031.31x = 31,699,633,487.79
  5. Step 5: Solve for x
    x = 31,699,633,487.79/259,031.31
  6. Step 6: Final answer
    x = 122,377.61

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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.