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Finding the Fourth Proportional to 139,674.26, 192,754.85 and 79,247.45

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Solution

The fourth proportional to 139,674.26, 192,754.85 and 79,247.45 is: 109,363.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,674.26 : 192,754.85 = 79,247.45 : x
  2. Step 2: Convert to fraction form
    139,674.26/192,754.85 = 79,247.45/x
  3. Step 3: Cross multiply
    139,674.26x = 192,754.85 × 79,247.45
  4. Step 4: Simplify right side
    139,674.26x = 15,275,328,977.62
  5. Step 5: Solve for x
    x = 15,275,328,977.62/139,674.26
  6. Step 6: Final answer
    x = 109,363.96

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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.