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Finding the Fourth Proportional to 163.67, 225.69 and 139.19

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Solution

The fourth proportional to 163.67, 225.69 and 139.19 is: 191.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.67 : 225.69 = 139.19 : x
  2. Step 2: Convert to fraction form
    163.67/225.69 = 139.19/x
  3. Step 3: Cross multiply
    163.67x = 225.69 × 139.19
  4. Step 4: Simplify right side
    163.67x = 31,413.79
  5. Step 5: Solve for x
    x = 31,413.79/163.67
  6. Step 6: Final answer
    x = 191.93

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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.