Home / 87,989.09-121,413.33-49,753.85

Finding the Fourth Proportional to 87,989.09, 121,413.33 and 49,753.85

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Solution

The fourth proportional to 87,989.09, 121,413.33 and 49,753.85 is: 68,653.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,989.09 : 121,413.33 = 49,753.85 : x
  2. Step 2: Convert to fraction form
    87,989.09/121,413.33 = 49,753.85/x
  3. Step 3: Cross multiply
    87,989.09x = 121,413.33 × 49,753.85
  4. Step 4: Simplify right side
    87,989.09x = 6,040,780,001.75
  5. Step 5: Solve for x
    x = 6,040,780,001.75/87,989.09
  6. Step 6: Final answer
    x = 68,653.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.