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Finding the Fourth Proportional to 134.67, 201.87 and 66.20

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Solution

The fourth proportional to 134.67, 201.87 and 66.20 is: 99.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.67 : 201.87 = 66.20 : x
  2. Step 2: Convert to fraction form
    134.67/201.87 = 66.20/x
  3. Step 3: Cross multiply
    134.67x = 201.87 × 66.20
  4. Step 4: Simplify right side
    134.67x = 13,362.78
  5. Step 5: Solve for x
    x = 13,362.78/134.67
  6. Step 6: Final answer
    x = 99.23

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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.