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Finding the Fourth Proportional to 74,110.97, 111,169.54 and 21,520.46

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Solution

The fourth proportional to 74,110.97, 111,169.54 and 21,520.46 is: 32,281.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,110.97 : 111,169.54 = 21,520.46 : x
  2. Step 2: Convert to fraction form
    74,110.97/111,169.54 = 21,520.46/x
  3. Step 3: Cross multiply
    74,110.97x = 111,169.54 × 21,520.46
  4. Step 4: Simplify right side
    74,110.97x = 2,392,419,943.61
  5. Step 5: Solve for x
    x = 2,392,419,943.61/74,110.97
  6. Step 6: Final answer
    x = 32,281.59

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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.