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Finding the Fourth Proportional to 70.82, 106.60 and 54.66

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Solution

The fourth proportional to 70.82, 106.60 and 54.66 is: 82.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.82 : 106.60 = 54.66 : x
  2. Step 2: Convert to fraction form
    70.82/106.60 = 54.66/x
  3. Step 3: Cross multiply
    70.82x = 106.60 × 54.66
  4. Step 4: Simplify right side
    70.82x = 5,826.42
  5. Step 5: Solve for x
    x = 5,826.42/70.82
  6. Step 6: Final answer
    x = 82.27

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.