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Finding the Fourth Proportional to 66.81, 100.22 and 32.58

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Solution

The fourth proportional to 66.81, 100.22 and 32.58 is: 48.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.81 : 100.22 = 32.58 : x
  2. Step 2: Convert to fraction form
    66.81/100.22 = 32.58/x
  3. Step 3: Cross multiply
    66.81x = 100.22 × 32.58
  4. Step 4: Simplify right side
    66.81x = 3,265.00
  5. Step 5: Solve for x
    x = 3,265.00/66.81
  6. Step 6: Final answer
    x = 48.87

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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.