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Finding the Fourth Proportional to 139,660.72, 192,729.91 and 75,998.37

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Solution

The fourth proportional to 139,660.72, 192,729.91 and 75,998.37 is: 104,876.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,660.72 : 192,729.91 = 75,998.37 : x
  2. Step 2: Convert to fraction form
    139,660.72/192,729.91 = 75,998.37/x
  3. Step 3: Cross multiply
    139,660.72x = 192,729.91 × 75,998.37
  4. Step 4: Simplify right side
    139,660.72x = 14,647,159,010.25
  5. Step 5: Solve for x
    x = 14,647,159,010.25/139,660.72
  6. Step 6: Final answer
    x = 104,876.73

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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.