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Finding the Fourth Proportional to 94.14, 129.88 and 74.46

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Solution

The fourth proportional to 94.14, 129.88 and 74.46 is: 102.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.14 : 129.88 = 74.46 : x
  2. Step 2: Convert to fraction form
    94.14/129.88 = 74.46/x
  3. Step 3: Cross multiply
    94.14x = 129.88 × 74.46
  4. Step 4: Simplify right side
    94.14x = 9,670.86
  5. Step 5: Solve for x
    x = 9,670.86/94.14
  6. Step 6: Final answer
    x = 102.73

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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.