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Finding the Fourth Proportional to 96.85, 133.80 and 93.66

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Solution

The fourth proportional to 96.85, 133.80 and 93.66 is: 129.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.85 : 133.80 = 93.66 : x
  2. Step 2: Convert to fraction form
    96.85/133.80 = 93.66/x
  3. Step 3: Cross multiply
    96.85x = 133.80 × 93.66
  4. Step 4: Simplify right side
    96.85x = 12,531.38
  5. Step 5: Solve for x
    x = 12,531.38/96.85
  6. Step 6: Final answer
    x = 129.40

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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.