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Finding the Fourth Proportional to 76.36, 105.34 and 50.12

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Solution

The fourth proportional to 76.36, 105.34 and 50.12 is: 69.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.36 : 105.34 = 50.12 : x
  2. Step 2: Convert to fraction form
    76.36/105.34 = 50.12/x
  3. Step 3: Cross multiply
    76.36x = 105.34 × 50.12
  4. Step 4: Simplify right side
    76.36x = 5,279.52
  5. Step 5: Solve for x
    x = 5,279.52/76.36
  6. Step 6: Final answer
    x = 69.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.