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Finding the Fourth Proportional to 134.52, 201.36 and 86.32

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Solution

The fourth proportional to 134.52, 201.36 and 86.32 is: 129.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.52 : 201.36 = 86.32 : x
  2. Step 2: Convert to fraction form
    134.52/201.36 = 86.32/x
  3. Step 3: Cross multiply
    134.52x = 201.36 × 86.32
  4. Step 4: Simplify right side
    134.52x = 17,381.40
  5. Step 5: Solve for x
    x = 17,381.40/134.52
  6. Step 6: Final answer
    x = 129.21

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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.