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Finding the Fourth Proportional to 97.13, 133.59 and 84.86

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Solution

The fourth proportional to 97.13, 133.59 and 84.86 is: 116.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.13 : 133.59 = 84.86 : x
  2. Step 2: Convert to fraction form
    97.13/133.59 = 84.86/x
  3. Step 3: Cross multiply
    97.13x = 133.59 × 84.86
  4. Step 4: Simplify right side
    97.13x = 11,336.45
  5. Step 5: Solve for x
    x = 11,336.45/97.13
  6. Step 6: Final answer
    x = 116.71

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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.