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Finding the Fourth Proportional to 139,660.79, 192,736.24 and 79,233.98

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Solution

The fourth proportional to 139,660.79, 192,736.24 and 79,233.98 is: 109,345.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,660.79 : 192,736.24 = 79,233.98 : x
  2. Step 2: Convert to fraction form
    139,660.79/192,736.24 = 79,233.98/x
  3. Step 3: Cross multiply
    139,660.79x = 192,736.24 × 79,233.98
  4. Step 4: Simplify right side
    139,660.79x = 15,271,259,385.44
  5. Step 5: Solve for x
    x = 15,271,259,385.44/139,660.79
  6. Step 6: Final answer
    x = 109,345.36

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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.