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Finding the Fourth Proportional to 134.31, 201.39 and 65.81

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Solution

The fourth proportional to 134.31, 201.39 and 65.81 is: 98.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.31 : 201.39 = 65.81 : x
  2. Step 2: Convert to fraction form
    134.31/201.39 = 65.81/x
  3. Step 3: Cross multiply
    134.31x = 201.39 × 65.81
  4. Step 4: Simplify right side
    134.31x = 13,252.47
  5. Step 5: Solve for x
    x = 13,252.47/134.31
  6. Step 6: Final answer
    x = 98.67

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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.