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Finding the Fourth Proportional to 139,183.52, 192,068.11 and 75,519.95

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Solution

The fourth proportional to 139,183.52, 192,068.11 and 75,519.95 is: 104,214.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,183.52 : 192,068.11 = 75,519.95 : x
  2. Step 2: Convert to fraction form
    139,183.52/192,068.11 = 75,519.95/x
  3. Step 3: Cross multiply
    139,183.52x = 192,068.11 × 75,519.95
  4. Step 4: Simplify right side
    139,183.52x = 14,504,973,197.85
  5. Step 5: Solve for x
    x = 14,504,973,197.85/139,183.52
  6. Step 6: Final answer
    x = 104,214.74

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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.