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Finding the Fourth Proportional to 54,383.34, 81,531.09 and 21,086.22

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Solution

The fourth proportional to 54,383.34, 81,531.09 and 21,086.22 is: 31,612.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,383.34 : 81,531.09 = 21,086.22 : x
  2. Step 2: Convert to fraction form
    54,383.34/81,531.09 = 21,086.22/x
  3. Step 3: Cross multiply
    54,383.34x = 81,531.09 × 21,086.22
  4. Step 4: Simplify right side
    54,383.34x = 1,719,182,500.58
  5. Step 5: Solve for x
    x = 1,719,182,500.58/54,383.34
  6. Step 6: Final answer
    x = 31,612.30

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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.