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Finding the Fourth Proportional to 86.44, 129.82 and 57.96

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Solution

The fourth proportional to 86.44, 129.82 and 57.96 is: 87.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    86.44 : 129.82 = 57.96 : x
  2. Step 2: Convert to fraction form
    86.44/129.82 = 57.96/x
  3. Step 3: Cross multiply
    86.44x = 129.82 × 57.96
  4. Step 4: Simplify right side
    86.44x = 7,524.37
  5. Step 5: Solve for x
    x = 7,524.37/86.44
  6. Step 6: Final answer
    x = 87.05

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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.