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Finding the Fourth Proportional to 133.10, 198.81 and 117.98

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Solution

The fourth proportional to 133.10, 198.81 and 117.98 is: 176.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.10 : 198.81 = 117.98 : x
  2. Step 2: Convert to fraction form
    133.10/198.81 = 117.98/x
  3. Step 3: Cross multiply
    133.10x = 198.81 × 117.98
  4. Step 4: Simplify right side
    133.10x = 23,455.60
  5. Step 5: Solve for x
    x = 23,455.60/133.10
  6. Step 6: Final answer
    x = 176.23

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.