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Finding the Fourth Proportional to 95.91, 143.98 and 86.11

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Solution

The fourth proportional to 95.91, 143.98 and 86.11 is: 129.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.91 : 143.98 = 86.11 : x
  2. Step 2: Convert to fraction form
    95.91/143.98 = 86.11/x
  3. Step 3: Cross multiply
    95.91x = 143.98 × 86.11
  4. Step 4: Simplify right side
    95.91x = 12,398.35
  5. Step 5: Solve for x
    x = 12,398.35/95.91
  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.