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Finding the Fourth Proportional to 76.33, 114.21 and 71.71

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Solution

The fourth proportional to 76.33, 114.21 and 71.71 is: 107.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.33 : 114.21 = 71.71 : x
  2. Step 2: Convert to fraction form
    76.33/114.21 = 71.71/x
  3. Step 3: Cross multiply
    76.33x = 114.21 × 71.71
  4. Step 4: Simplify right side
    76.33x = 8,190.00
  5. Step 5: Solve for x
    x = 8,190.00/76.33
  6. Step 6: Final answer
    x = 107.30

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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.