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Finding the Fourth Proportional to 67,072.88, 100,591.32 and 31,942.64

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Solution

The fourth proportional to 67,072.88, 100,591.32 and 31,942.64 is: 47,905.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,072.88 : 100,591.32 = 31,942.64 : x
  2. Step 2: Convert to fraction form
    67,072.88/100,591.32 = 31,942.64/x
  3. Step 3: Cross multiply
    67,072.88x = 100,591.32 × 31,942.64
  4. Step 4: Simplify right side
    67,072.88x = 3,213,152,321.88
  5. Step 5: Solve for x
    x = 3,213,152,321.88/67,072.88
  6. Step 6: Final answer
    x = 47,905.39

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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.