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Finding the Fourth Proportional to 139,634.78, 192,690.24 and 75,972.83

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Solution

The fourth proportional to 139,634.78, 192,690.24 and 75,972.83 is: 104,839.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,634.78 : 192,690.24 = 75,972.83 : x
  2. Step 2: Convert to fraction form
    139,634.78/192,690.24 = 75,972.83/x
  3. Step 3: Cross multiply
    139,634.78x = 192,690.24 × 75,972.83
  4. Step 4: Simplify right side
    139,634.78x = 14,639,222,846.18
  5. Step 5: Solve for x
    x = 14,639,222,846.18/139,634.78
  6. Step 6: Final answer
    x = 104,839.37

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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.