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Finding the Fourth Proportional to 85.01, 127.42 and 50.79

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Solution

The fourth proportional to 85.01, 127.42 and 50.79 is: 76.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85.01 : 127.42 = 50.79 : x
  2. Step 2: Convert to fraction form
    85.01/127.42 = 50.79/x
  3. Step 3: Cross multiply
    85.01x = 127.42 × 50.79
  4. Step 4: Simplify right side
    85.01x = 6,471.53
  5. Step 5: Solve for x
    x = 6,471.53/85.01
  6. Step 6: Final answer
    x = 76.12

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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.