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Finding the Fourth Proportional to 133.19, 199.61 and 98.68

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Solution

The fourth proportional to 133.19, 199.61 and 98.68 is: 147.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.19 : 199.61 = 98.68 : x
  2. Step 2: Convert to fraction form
    133.19/199.61 = 98.68/x
  3. Step 3: Cross multiply
    133.19x = 199.61 × 98.68
  4. Step 4: Simplify right side
    133.19x = 19,696.52
  5. Step 5: Solve for x
    x = 19,696.52/133.19
  6. Step 6: Final answer
    x = 147.88

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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.