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Finding the Fourth Proportional to 139,591.44, 192,670.40 and 79,197.43

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Solution

The fourth proportional to 139,591.44, 192,670.40 and 79,197.43 is: 109,311.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,591.44 : 192,670.40 = 79,197.43 : x
  2. Step 2: Convert to fraction form
    139,591.44/192,670.40 = 79,197.43/x
  3. Step 3: Cross multiply
    139,591.44x = 192,670.40 × 79,197.43
  4. Step 4: Simplify right side
    139,591.44x = 15,259,000,121.08
  5. Step 5: Solve for x
    x = 15,259,000,121.08/139,591.44
  6. Step 6: Final answer
    x = 109,311.87

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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.