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Finding the Fourth Proportional to 133.28, 198.77 and 130.18

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Solution

The fourth proportional to 133.28, 198.77 and 130.18 is: 194.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.28 : 198.77 = 130.18 : x
  2. Step 2: Convert to fraction form
    133.28/198.77 = 130.18/x
  3. Step 3: Cross multiply
    133.28x = 198.77 × 130.18
  4. Step 4: Simplify right side
    133.28x = 25,875.71
  5. Step 5: Solve for x
    x = 25,875.71/133.28
  6. Step 6: Final answer
    x = 194.14

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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.