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Finding the Fourth Proportional to 76.24, 114.29 and 28.13

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Solution

The fourth proportional to 76.24, 114.29 and 28.13 is: 42.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.24 : 114.29 = 28.13 : x
  2. Step 2: Convert to fraction form
    76.24/114.29 = 28.13/x
  3. Step 3: Cross multiply
    76.24x = 114.29 × 28.13
  4. Step 4: Simplify right side
    76.24x = 3,215.33
  5. Step 5: Solve for x
    x = 3,215.33/76.24
  6. Step 6: Final answer
    x = 42.18

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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.