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Finding the Fourth Proportional to 133.95, 199.61 and 129.59

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Solution

The fourth proportional to 133.95, 199.61 and 129.59 is: 193.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.95 : 199.61 = 129.59 : x
  2. Step 2: Convert to fraction form
    133.95/199.61 = 129.59/x
  3. Step 3: Cross multiply
    133.95x = 199.61 × 129.59
  4. Step 4: Simplify right side
    133.95x = 25,865.81
  5. Step 5: Solve for x
    x = 25,865.81/133.95
  6. Step 6: Final answer
    x = 193.10

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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.