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Finding the Fourth Proportional to 74,252.70, 111,367.20 and 21,649.88

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Solution

The fourth proportional to 74,252.70, 111,367.20 and 21,649.88 is: 32,471.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,252.70 : 111,367.20 = 21,649.88 : x
  2. Step 2: Convert to fraction form
    74,252.70/111,367.20 = 21,649.88/x
  3. Step 3: Cross multiply
    74,252.70x = 111,367.20 × 21,649.88
  4. Step 4: Simplify right side
    74,252.70x = 2,411,086,515.94
  5. Step 5: Solve for x
    x = 2,411,086,515.94/74,252.70
  6. Step 6: Final answer
    x = 32,471.36

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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.