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Finding the Fourth Proportional to 134.56, 201.84 and 86.50

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Solution

The fourth proportional to 134.56, 201.84 and 86.50 is: 129.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.56 : 201.84 = 86.50 : x
  2. Step 2: Convert to fraction form
    134.56/201.84 = 86.50/x
  3. Step 3: Cross multiply
    134.56x = 201.84 × 86.50
  4. Step 4: Simplify right side
    134.56x = 17,459.16
  5. Step 5: Solve for x
    x = 17,459.16/134.56
  6. Step 6: Final answer
    x = 129.75

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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.