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Finding the Fourth Proportional to 54,542.60, 81,793.64 and 18,994.79

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Solution

The fourth proportional to 54,542.60, 81,793.64 and 18,994.79 is: 28,485.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,542.60 : 81,793.64 = 18,994.79 : x
  2. Step 2: Convert to fraction form
    54,542.60/81,793.64 = 18,994.79/x
  3. Step 3: Cross multiply
    54,542.60x = 81,793.64 × 18,994.79
  4. Step 4: Simplify right side
    54,542.60x = 1,553,652,920.16
  5. Step 5: Solve for x
    x = 1,553,652,920.16/54,542.60
  6. Step 6: Final answer
    x = 28,485.13

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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.