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Finding the Fourth Proportional to 135.05, 202.61 and 66.57

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Solution

The fourth proportional to 135.05, 202.61 and 66.57 is: 99.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.05 : 202.61 = 66.57 : x
  2. Step 2: Convert to fraction form
    135.05/202.61 = 66.57/x
  3. Step 3: Cross multiply
    135.05x = 202.61 × 66.57
  4. Step 4: Simplify right side
    135.05x = 13,487.41
  5. Step 5: Solve for x
    x = 13,487.41/135.05
  6. Step 6: Final answer
    x = 99.87

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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.