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Finding the Fourth Proportional to 133.21, 199.89 and 61.06

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Solution

The fourth proportional to 133.21, 199.89 and 61.06 is: 91.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.21 : 199.89 = 61.06 : x
  2. Step 2: Convert to fraction form
    133.21/199.89 = 61.06/x
  3. Step 3: Cross multiply
    133.21x = 199.89 × 61.06
  4. Step 4: Simplify right side
    133.21x = 12,205.28
  5. Step 5: Solve for x
    x = 12,205.28/133.21
  6. Step 6: Final answer
    x = 91.62

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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.