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Finding the Fourth Proportional to 76.17, 104.97 and 54.30

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Solution

The fourth proportional to 76.17, 104.97 and 54.30 is: 74.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.17 : 104.97 = 54.30 : x
  2. Step 2: Convert to fraction form
    76.17/104.97 = 54.30/x
  3. Step 3: Cross multiply
    76.17x = 104.97 × 54.30
  4. Step 4: Simplify right side
    76.17x = 5,699.87
  5. Step 5: Solve for x
    x = 5,699.87/76.17
  6. Step 6: Final answer
    x = 74.83

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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.