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Finding the Fourth Proportional to 72,940.88, 109,100.28 and 44,791.76

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Solution

The fourth proportional to 72,940.88, 109,100.28 and 44,791.76 is: 66,996.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,940.88 : 109,100.28 = 44,791.76 : x
  2. Step 2: Convert to fraction form
    72,940.88/109,100.28 = 44,791.76/x
  3. Step 3: Cross multiply
    72,940.88x = 109,100.28 × 44,791.76
  4. Step 4: Simplify right side
    72,940.88x = 4,886,793,557.69
  5. Step 5: Solve for x
    x = 4,886,793,557.69/72,940.88
  6. Step 6: Final answer
    x = 66,996.64

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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.