Home / 258,894.09-388,331.92-90,413.75

Finding the Fourth Proportional to 258,894.09, 388,331.92 and 90,413.75

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Solution

The fourth proportional to 258,894.09, 388,331.92 and 90,413.75 is: 135,617.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,894.09 : 388,331.92 = 90,413.75 : x
  2. Step 2: Convert to fraction form
    258,894.09/388,331.92 = 90,413.75/x
  3. Step 3: Cross multiply
    258,894.09x = 388,331.92 × 90,413.75
  4. Step 4: Simplify right side
    258,894.09x = 35,110,546,215.75
  5. Step 5: Solve for x
    x = 35,110,546,215.75/258,894.09
  6. Step 6: Final answer
    x = 135,617.41

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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.