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Finding the Fourth Proportional to 94.81, 142.08 and 54.22

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Solution

The fourth proportional to 94.81, 142.08 and 54.22 is: 81.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.81 : 142.08 = 54.22 : x
  2. Step 2: Convert to fraction form
    94.81/142.08 = 54.22/x
  3. Step 3: Cross multiply
    94.81x = 142.08 × 54.22
  4. Step 4: Simplify right side
    94.81x = 7,703.58
  5. Step 5: Solve for x
    x = 7,703.58/94.81
  6. Step 6: Final answer
    x = 81.25

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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.