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Finding the Fourth Proportional to 139,704.98, 192,793.82 and 76,043.43

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Solution

The fourth proportional to 139,704.98, 192,793.82 and 76,043.43 is: 104,940.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,704.98 : 192,793.82 = 76,043.43 : x
  2. Step 2: Convert to fraction form
    139,704.98/192,793.82 = 76,043.43/x
  3. Step 3: Cross multiply
    139,704.98x = 192,793.82 × 76,043.43
  4. Step 4: Simplify right side
    139,704.98x = 14,660,702,975.39
  5. Step 5: Solve for x
    x = 14,660,702,975.39/139,704.98
  6. Step 6: Final answer
    x = 104,940.45

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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.