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Finding the Fourth Proportional to 102.20, 141.03 and 94.76

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Solution

The fourth proportional to 102.20, 141.03 and 94.76 is: 130.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.20 : 141.03 = 94.76 : x
  2. Step 2: Convert to fraction form
    102.20/141.03 = 94.76/x
  3. Step 3: Cross multiply
    102.20x = 141.03 × 94.76
  4. Step 4: Simplify right side
    102.20x = 13,363.30
  5. Step 5: Solve for x
    x = 13,363.30/102.20
  6. Step 6: Final answer
    x = 130.75

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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.