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Finding the Fourth Proportional to 54,379.85, 81,599.49 and 21,101.22

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Solution

The fourth proportional to 54,379.85, 81,599.49 and 21,101.22 is: 31,663.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,379.85 : 81,599.49 = 21,101.22 : x
  2. Step 2: Convert to fraction form
    54,379.85/81,599.49 = 21,101.22/x
  3. Step 3: Cross multiply
    54,379.85x = 81,599.49 × 21,101.22
  4. Step 4: Simplify right side
    54,379.85x = 1,721,848,790.38
  5. Step 5: Solve for x
    x = 1,721,848,790.38/54,379.85
  6. Step 6: Final answer
    x = 31,663.36

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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.