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Finding the Fourth Proportional to 54,331.76, 81,481.82 and 21,044.40

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Solution

The fourth proportional to 54,331.76, 81,481.82 and 21,044.40 is: 31,560.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,331.76 : 81,481.82 = 21,044.40 : x
  2. Step 2: Convert to fraction form
    54,331.76/81,481.82 = 21,044.40/x
  3. Step 3: Cross multiply
    54,331.76x = 81,481.82 × 21,044.40
  4. Step 4: Simplify right side
    54,331.76x = 1,714,735,907.59
  5. Step 5: Solve for x
    x = 1,714,735,907.59/54,331.76
  6. Step 6: Final answer
    x = 31,560.47

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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.