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Finding the Fourth Proportional to 76.00, 114.16 and 54.40

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Solution

The fourth proportional to 76.00, 114.16 and 54.40 is: 81.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.00 : 114.16 = 54.40 : x
  2. Step 2: Convert to fraction form
    76.00/114.16 = 54.40/x
  3. Step 3: Cross multiply
    76.00x = 114.16 × 54.40
  4. Step 4: Simplify right side
    76.00x = 6,209.73
  5. Step 5: Solve for x
    x = 6,209.73/76.00
  6. Step 6: Final answer
    x = 81.71

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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.