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Finding the Fourth Proportional to 139,562.21, 192,591.73 and 79,138.37

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Solution

The fourth proportional to 139,562.21, 192,591.73 and 79,138.37 is: 109,208.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,562.21 : 192,591.73 = 79,138.37 : x
  2. Step 2: Convert to fraction form
    139,562.21/192,591.73 = 79,138.37/x
  3. Step 3: Cross multiply
    139,562.21x = 192,591.73 × 79,138.37
  4. Step 4: Simplify right side
    139,562.21x = 15,241,395,587.68
  5. Step 5: Solve for x
    x = 15,241,395,587.68/139,562.21
  6. Step 6: Final answer
    x = 109,208.61

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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.