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Finding the Fourth Proportional to 129.55, 193.72 and 94.95

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Solution

The fourth proportional to 129.55, 193.72 and 94.95 is: 141.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.55 : 193.72 = 94.95 : x
  2. Step 2: Convert to fraction form
    129.55/193.72 = 94.95/x
  3. Step 3: Cross multiply
    129.55x = 193.72 × 94.95
  4. Step 4: Simplify right side
    129.55x = 18,393.24
  5. Step 5: Solve for x
    x = 18,393.24/129.55
  6. Step 6: Final answer
    x = 141.98

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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.