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Finding the Fourth Proportional to 139,487.87, 192,425.58 and 82,859.15

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Solution

The fourth proportional to 139,487.87, 192,425.58 and 82,859.15 is: 114,305.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,487.87 : 192,425.58 = 82,859.15 : x
  2. Step 2: Convert to fraction form
    139,487.87/192,425.58 = 82,859.15/x
  3. Step 3: Cross multiply
    139,487.87x = 192,425.58 × 82,859.15
  4. Step 4: Simplify right side
    139,487.87x = 15,944,219,034.93
  5. Step 5: Solve for x
    x = 15,944,219,034.93/139,487.87
  6. Step 6: Final answer
    x = 114,305.42

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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.