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Finding the Fourth Proportional to 192,661.92, 288,963.72 and 52,431.48

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Solution

The fourth proportional to 192,661.92, 288,963.72 and 52,431.48 is: 78,639.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,661.92 : 288,963.72 = 52,431.48 : x
  2. Step 2: Convert to fraction form
    192,661.92/288,963.72 = 52,431.48/x
  3. Step 3: Cross multiply
    192,661.92x = 288,963.72 × 52,431.48
  4. Step 4: Simplify right side
    192,661.92x = 15,150,795,505.91
  5. Step 5: Solve for x
    x = 15,150,795,505.91/192,661.92
  6. Step 6: Final answer
    x = 78,639.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.