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Finding the Fourth Proportional to 139,741.88, 192,811 and 79,298.88

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Solution

The fourth proportional to 139,741.88, 192,811 and 79,298.88 is: 109,413.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,741.88 : 192,811 = 79,298.88 : x
  2. Step 2: Convert to fraction form
    139,741.88/192,811 = 79,298.88/x
  3. Step 3: Cross multiply
    139,741.88x = 192,811 × 79,298.88
  4. Step 4: Simplify right side
    139,741.88x = 15,289,696,351.68
  5. Step 5: Solve for x
    x = 15,289,696,351.68/139,741.88
  6. Step 6: Final answer
    x = 109,413.84

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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.