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Finding the Fourth Proportional to 94.53, 142.09 and 76.48

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Solution

The fourth proportional to 94.53, 142.09 and 76.48 is: 114.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.53 : 142.09 = 76.48 : x
  2. Step 2: Convert to fraction form
    94.53/142.09 = 76.48/x
  3. Step 3: Cross multiply
    94.53x = 142.09 × 76.48
  4. Step 4: Simplify right side
    94.53x = 10,866.50
  5. Step 5: Solve for x
    x = 10,866.50/94.53
  6. Step 6: Final answer
    x = 114.95

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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.