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Finding the Fourth Proportional to 139,235.52, 192,139.87 and 75,571.96

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Solution

The fourth proportional to 139,235.52, 192,139.87 and 75,571.96 is: 104,286.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,235.52 : 192,139.87 = 75,571.96 : x
  2. Step 2: Convert to fraction form
    139,235.52/192,139.87 = 75,571.96/x
  3. Step 3: Cross multiply
    139,235.52x = 192,139.87 × 75,571.96
  4. Step 4: Simplify right side
    139,235.52x = 14,520,386,570.05
  5. Step 5: Solve for x
    x = 14,520,386,570.05/139,235.52
  6. Step 6: Final answer
    x = 104,286.51

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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.