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Finding the Fourth Proportional to 54,644.81, 81,987.86 and 21,388.64

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Solution

The fourth proportional to 54,644.81, 81,987.86 and 21,388.64 is: 32,091.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,644.81 : 81,987.86 = 21,388.64 : x
  2. Step 2: Convert to fraction form
    54,644.81/81,987.86 = 21,388.64/x
  3. Step 3: Cross multiply
    54,644.81x = 81,987.86 × 21,388.64
  4. Step 4: Simplify right side
    54,644.81x = 1,753,608,465.44
  5. Step 5: Solve for x
    x = 1,753,608,465.44/54,644.81
  6. Step 6: Final answer
    x = 32,091.04

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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.