Home / 218,112.57-300,992.38-121,315.50

Finding the Fourth Proportional to 218,112.57, 300,992.38 and 121,315.50

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Solution

The fourth proportional to 218,112.57, 300,992.38 and 121,315.50 is: 167,413.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,112.57 : 300,992.38 = 121,315.50 : x
  2. Step 2: Convert to fraction form
    218,112.57/300,992.38 = 121,315.50/x
  3. Step 3: Cross multiply
    218,112.57x = 300,992.38 × 121,315.50
  4. Step 4: Simplify right side
    218,112.57x = 36,515,040,772.60
  5. Step 5: Solve for x
    x = 36,515,040,772.60/218,112.57
  6. Step 6: Final answer
    x = 167,413.74

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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.