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Finding the Fourth Proportional to 139,591.94, 192,671.09 and 79,197.93

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Solution

The fourth proportional to 139,591.94, 192,671.09 and 79,197.93 is: 109,312.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,591.94 : 192,671.09 = 79,197.93 : x
  2. Step 2: Convert to fraction form
    139,591.94/192,671.09 = 79,197.93/x
  3. Step 3: Cross multiply
    139,591.94x = 192,671.09 × 79,197.93
  4. Step 4: Simplify right side
    139,591.94x = 15,259,151,102.85
  5. Step 5: Solve for x
    x = 15,259,151,102.85/139,591.94
  6. Step 6: Final answer
    x = 109,312.56

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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.