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Finding the Fourth Proportional to 134.18, 201.19 and 42.85

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Solution

The fourth proportional to 134.18, 201.19 and 42.85 is: 64.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.18 : 201.19 = 42.85 : x
  2. Step 2: Convert to fraction form
    134.18/201.19 = 42.85/x
  3. Step 3: Cross multiply
    134.18x = 201.19 × 42.85
  4. Step 4: Simplify right side
    134.18x = 8,620.99
  5. Step 5: Solve for x
    x = 8,620.99/134.18
  6. Step 6: Final answer
    x = 64.25

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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.