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Finding the Fourth Proportional to 272,072.62, 408,108.39 and 72,393

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Solution

The fourth proportional to 272,072.62, 408,108.39 and 72,393 is: 108,589.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,072.62 : 408,108.39 = 72,393 : x
  2. Step 2: Convert to fraction form
    272,072.62/408,108.39 = 72,393/x
  3. Step 3: Cross multiply
    272,072.62x = 408,108.39 × 72,393
  4. Step 4: Simplify right side
    272,072.62x = 29,544,190,677.27
  5. Step 5: Solve for x
    x = 29,544,190,677.27/272,072.62
  6. Step 6: Final answer
    x = 108,589.36

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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.