Home / 128,669.67-192,791.09-91,043.24

Finding the Fourth Proportional to 128,669.67, 192,791.09 and 91,043.24

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Solution

The fourth proportional to 128,669.67, 192,791.09 and 91,043.24 is: 136,413.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,669.67 : 192,791.09 = 91,043.24 : x
  2. Step 2: Convert to fraction form
    128,669.67/192,791.09 = 91,043.24/x
  3. Step 3: Cross multiply
    128,669.67x = 192,791.09 × 91,043.24
  4. Step 4: Simplify right side
    128,669.67x = 17,552,324,740.38
  5. Step 5: Solve for x
    x = 17,552,324,740.38/128,669.67
  6. Step 6: Final answer
    x = 136,413.85

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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.