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Finding the Fourth Proportional to 132.06, 197.90 and 86.26

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Solution

The fourth proportional to 132.06, 197.90 and 86.26 is: 129.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.06 : 197.90 = 86.26 : x
  2. Step 2: Convert to fraction form
    132.06/197.90 = 86.26/x
  3. Step 3: Cross multiply
    132.06x = 197.90 × 86.26
  4. Step 4: Simplify right side
    132.06x = 17,070.85
  5. Step 5: Solve for x
    x = 17,070.85/132.06
  6. Step 6: Final answer
    x = 129.27

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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.