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Finding the Fourth Proportional to 139,791.15, 192,904.93 and 79,353.71

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Solution

The fourth proportional to 139,791.15, 192,904.93 and 79,353.71 is: 109,504.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,791.15 : 192,904.93 = 79,353.71 : x
  2. Step 2: Convert to fraction form
    139,791.15/192,904.93 = 79,353.71/x
  3. Step 3: Cross multiply
    139,791.15x = 192,904.93 × 79,353.71
  4. Step 4: Simplify right side
    139,791.15x = 15,307,721,872.79
  5. Step 5: Solve for x
    x = 15,307,721,872.79/139,791.15
  6. Step 6: Final answer
    x = 109,504.23

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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.