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Finding the Fourth Proportional to 94.75, 130.72 and 55.42

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Solution

The fourth proportional to 94.75, 130.72 and 55.42 is: 76.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.75 : 130.72 = 55.42 : x
  2. Step 2: Convert to fraction form
    94.75/130.72 = 55.42/x
  3. Step 3: Cross multiply
    94.75x = 130.72 × 55.42
  4. Step 4: Simplify right side
    94.75x = 7,244.50
  5. Step 5: Solve for x
    x = 7,244.50/94.75
  6. Step 6: Final answer
    x = 76.46

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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.