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Finding the Fourth Proportional to 177.91, 266.93 and 86.62

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Solution

The fourth proportional to 177.91, 266.93 and 86.62 is: 129.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.91 : 266.93 = 86.62 : x
  2. Step 2: Convert to fraction form
    177.91/266.93 = 86.62/x
  3. Step 3: Cross multiply
    177.91x = 266.93 × 86.62
  4. Step 4: Simplify right side
    177.91x = 23,121.20
  5. Step 5: Solve for x
    x = 23,121.20/177.91
  6. Step 6: Final answer
    x = 129.96

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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.