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Finding the Fourth Proportional to 54.48, 81.36 and 48.04

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Solution

The fourth proportional to 54.48, 81.36 and 48.04 is: 71.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.48 : 81.36 = 48.04 : x
  2. Step 2: Convert to fraction form
    54.48/81.36 = 48.04/x
  3. Step 3: Cross multiply
    54.48x = 81.36 × 48.04
  4. Step 4: Simplify right side
    54.48x = 3,908.53
  5. Step 5: Solve for x
    x = 3,908.53/54.48
  6. Step 6: Final answer
    x = 71.74

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Why These Related Problems?

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