Home / 258,717.22-388,140.41-90,239.96

Finding the Fourth Proportional to 258,717.22, 388,140.41 and 90,239.96

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Solution

The fourth proportional to 258,717.22, 388,140.41 and 90,239.96 is: 135,382.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,717.22 : 388,140.41 = 90,239.96 : x
  2. Step 2: Convert to fraction form
    258,717.22/388,140.41 = 90,239.96/x
  3. Step 3: Cross multiply
    258,717.22x = 388,140.41 × 90,239.96
  4. Step 4: Simplify right side
    258,717.22x = 35,025,775,072.78
  5. Step 5: Solve for x
    x = 35,025,775,072.78/258,717.22
  6. Step 6: Final answer
    x = 135,382.47

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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.