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Finding the Fourth Proportional to 139,660.29, 192,735.54 and 79,233.48

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Solution

The fourth proportional to 139,660.29, 192,735.54 and 79,233.48 is: 109,344.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,660.29 : 192,735.54 = 79,233.48 : x
  2. Step 2: Convert to fraction form
    139,660.29/192,735.54 = 79,233.48/x
  3. Step 3: Cross multiply
    139,660.29x = 192,735.54 × 79,233.48
  4. Step 4: Simplify right side
    139,660.29x = 15,271,107,553.88
  5. Step 5: Solve for x
    x = 15,271,107,553.88/139,660.29
  6. Step 6: Final answer
    x = 109,344.66

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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.