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Finding the Fourth Proportional to 94.20, 141.12 and 88.80

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Solution

The fourth proportional to 94.20, 141.12 and 88.80 is: 133.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.20 : 141.12 = 88.80 : x
  2. Step 2: Convert to fraction form
    94.20/141.12 = 88.80/x
  3. Step 3: Cross multiply
    94.20x = 141.12 × 88.80
  4. Step 4: Simplify right side
    94.20x = 12,531.46
  5. Step 5: Solve for x
    x = 12,531.46/94.20
  6. Step 6: Final answer
    x = 133.03

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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.