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Finding the Fourth Proportional to 54.16, 81.16 and 36.09

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Solution

The fourth proportional to 54.16, 81.16 and 36.09 is: 54.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.16 : 81.16 = 36.09 : x
  2. Step 2: Convert to fraction form
    54.16/81.16 = 36.09/x
  3. Step 3: Cross multiply
    54.16x = 81.16 × 36.09
  4. Step 4: Simplify right side
    54.16x = 2,929.06
  5. Step 5: Solve for x
    x = 2,929.06/54.16
  6. Step 6: Final answer
    x = 54.08

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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.