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Finding the Fourth Proportional to 76.27, 114.20 and 61.10

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Solution

The fourth proportional to 76.27, 114.20 and 61.10 is: 91.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.27 : 114.20 = 61.10 : x
  2. Step 2: Convert to fraction form
    76.27/114.20 = 61.10/x
  3. Step 3: Cross multiply
    76.27x = 114.20 × 61.10
  4. Step 4: Simplify right side
    76.27x = 6,977.31
  5. Step 5: Solve for x
    x = 6,977.31/76.27
  6. Step 6: Final answer
    x = 91.49

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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.