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Finding the Fourth Proportional to 139,629.97, 192,691.33 and 75,967.82

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Solution

The fourth proportional to 139,629.97, 192,691.33 and 75,967.82 is: 104,836.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,629.97 : 192,691.33 = 75,967.82 : x
  2. Step 2: Convert to fraction form
    139,629.97/192,691.33 = 75,967.82/x
  3. Step 3: Cross multiply
    139,629.97x = 192,691.33 × 75,967.82
  4. Step 4: Simplify right side
    139,629.97x = 14,638,339,119.62
  5. Step 5: Solve for x
    x = 14,638,339,119.62/139,629.97
  6. Step 6: Final answer
    x = 104,836.66

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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.