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Finding the Fourth Proportional to 97.14, 133.98 and 66

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Solution

The fourth proportional to 97.14, 133.98 and 66 is: 91.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.14 : 133.98 = 66 : x
  2. Step 2: Convert to fraction form
    97.14/133.98 = 66/x
  3. Step 3: Cross multiply
    97.14x = 133.98 × 66
  4. Step 4: Simplify right side
    97.14x = 8,842.68
  5. Step 5: Solve for x
    x = 8,842.68/97.14
  6. Step 6: Final answer
    x = 91.03

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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.