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Finding the Fourth Proportional to 139,796.70, 192,924.91 and 79,372.97

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Solution

The fourth proportional to 139,796.70, 192,924.91 and 79,372.97 is: 109,537.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,796.70 : 192,924.91 = 79,372.97 : x
  2. Step 2: Convert to fraction form
    139,796.70/192,924.91 = 79,372.97/x
  3. Step 3: Cross multiply
    139,796.70x = 192,924.91 × 79,372.97
  4. Step 4: Simplify right side
    139,796.70x = 15,313,022,129.06
  5. Step 5: Solve for x
    x = 15,313,022,129.06/139,796.70
  6. Step 6: Final answer
    x = 109,537.79

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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.