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Finding the Fourth Proportional to 94.28, 130.09 and 54.94

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Solution

The fourth proportional to 94.28, 130.09 and 54.94 is: 75.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.28 : 130.09 = 54.94 : x
  2. Step 2: Convert to fraction form
    94.28/130.09 = 54.94/x
  3. Step 3: Cross multiply
    94.28x = 130.09 × 54.94
  4. Step 4: Simplify right side
    94.28x = 7,147.14
  5. Step 5: Solve for x
    x = 7,147.14/94.28
  6. Step 6: Final answer
    x = 75.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.