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Finding the Fourth Proportional to 86.18, 129.24 and 32.05

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Solution

The fourth proportional to 86.18, 129.24 and 32.05 is: 48.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    86.18 : 129.24 = 32.05 : x
  2. Step 2: Convert to fraction form
    86.18/129.24 = 32.05/x
  3. Step 3: Cross multiply
    86.18x = 129.24 × 32.05
  4. Step 4: Simplify right side
    86.18x = 4,141.82
  5. Step 5: Solve for x
    x = 4,141.82/86.18
  6. Step 6: Final answer
    x = 48.06

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.