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Finding the Fourth Proportional to 54.28, 81.12 and 46.18

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Solution

The fourth proportional to 54.28, 81.12 and 46.18 is: 69.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.28 : 81.12 = 46.18 : x
  2. Step 2: Convert to fraction form
    54.28/81.12 = 46.18/x
  3. Step 3: Cross multiply
    54.28x = 81.12 × 46.18
  4. Step 4: Simplify right side
    54.28x = 3,746.12
  5. Step 5: Solve for x
    x = 3,746.12/54.28
  6. Step 6: Final answer
    x = 69.01

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.