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Finding the Fourth Proportional to 54,488.74, 81,730.89 and 18,958.19

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Solution

The fourth proportional to 54,488.74, 81,730.89 and 18,958.19 is: 28,436.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,488.74 : 81,730.89 = 18,958.19 : x
  2. Step 2: Convert to fraction form
    54,488.74/81,730.89 = 18,958.19/x
  3. Step 3: Cross multiply
    54,488.74x = 81,730.89 × 18,958.19
  4. Step 4: Simplify right side
    54,488.74x = 1,549,469,741.49
  5. Step 5: Solve for x
    x = 1,549,469,741.49/54,488.74
  6. Step 6: Final answer
    x = 28,436.51

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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.