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Finding the Fourth Proportional to 139,465.85, 192,468.60 and 79,035.84

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Solution

The fourth proportional to 139,465.85, 192,468.60 and 79,035.84 is: 109,072.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,465.85 : 192,468.60 = 79,035.84 : x
  2. Step 2: Convert to fraction form
    139,465.85/192,468.60 = 79,035.84/x
  3. Step 3: Cross multiply
    139,465.85x = 192,468.60 × 79,035.84
  4. Step 4: Simplify right side
    139,465.85x = 15,211,917,474.62
  5. Step 5: Solve for x
    x = 15,211,917,474.62/139,465.85
  6. Step 6: Final answer
    x = 109,072.71

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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.