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Finding the Fourth Proportional to 139,178.51, 192,067.57 and 75,517.57

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Solution

The fourth proportional to 139,178.51, 192,067.57 and 75,517.57 is: 104,214.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,178.51 : 192,067.57 = 75,517.57 : x
  2. Step 2: Convert to fraction form
    139,178.51/192,067.57 = 75,517.57/x
  3. Step 3: Cross multiply
    139,178.51x = 192,067.57 × 75,517.57
  4. Step 4: Simplify right side
    139,178.51x = 14,504,476,162.20
  5. Step 5: Solve for x
    x = 14,504,476,162.20/139,178.51
  6. Step 6: Final answer
    x = 104,214.91

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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.