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Finding the Fourth Proportional to 54.07, 81.09 and 17.99

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Solution

The fourth proportional to 54.07, 81.09 and 17.99 is: 26.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.07 : 81.09 = 17.99 : x
  2. Step 2: Convert to fraction form
    54.07/81.09 = 17.99/x
  3. Step 3: Cross multiply
    54.07x = 81.09 × 17.99
  4. Step 4: Simplify right side
    54.07x = 1,458.81
  5. Step 5: Solve for x
    x = 1,458.81/54.07
  6. Step 6: Final answer
    x = 26.98

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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.