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Finding the Fourth Proportional to 54,481.80, 81,722.70 and 19,422.60

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Solution

The fourth proportional to 54,481.80, 81,722.70 and 19,422.60 is: 29,133.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,481.80 : 81,722.70 = 19,422.60 : x
  2. Step 2: Convert to fraction form
    54,481.80/81,722.70 = 19,422.60/x
  3. Step 3: Cross multiply
    54,481.80x = 81,722.70 × 19,422.60
  4. Step 4: Simplify right side
    54,481.80x = 1,587,267,313.02
  5. Step 5: Solve for x
    x = 1,587,267,313.02/54,481.80
  6. Step 6: Final answer
    x = 29,133.90

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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.