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Finding the Fourth Proportional to 139,305.52, 192,241.64 and 75,643.33

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Solution

The fourth proportional to 139,305.52, 192,241.64 and 75,643.33 is: 104,387.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,305.52 : 192,241.64 = 75,643.33 : x
  2. Step 2: Convert to fraction form
    139,305.52/192,241.64 = 75,643.33/x
  3. Step 3: Cross multiply
    139,305.52x = 192,241.64 × 75,643.33
  4. Step 4: Simplify right side
    139,305.52x = 14,541,797,436.04
  5. Step 5: Solve for x
    x = 14,541,797,436.04/139,305.52
  6. Step 6: Final answer
    x = 104,387.81

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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.