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Finding the Fourth Proportional to 94.85, 130.74 and 63.75

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Solution

The fourth proportional to 94.85, 130.74 and 63.75 is: 87.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.85 : 130.74 = 63.75 : x
  2. Step 2: Convert to fraction form
    94.85/130.74 = 63.75/x
  3. Step 3: Cross multiply
    94.85x = 130.74 × 63.75
  4. Step 4: Simplify right side
    94.85x = 8,334.68
  5. Step 5: Solve for x
    x = 8,334.68/94.85
  6. Step 6: Final answer
    x = 87.88

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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.