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Finding the Fourth Proportional to 133.94, 200.77 and 85.19

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Solution

The fourth proportional to 133.94, 200.77 and 85.19 is: 127.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.94 : 200.77 = 85.19 : x
  2. Step 2: Convert to fraction form
    133.94/200.77 = 85.19/x
  3. Step 3: Cross multiply
    133.94x = 200.77 × 85.19
  4. Step 4: Simplify right side
    133.94x = 17,102.38
  5. Step 5: Solve for x
    x = 17,102.38/133.94
  6. Step 6: Final answer
    x = 127.68

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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.