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Finding the Fourth Proportional to 177.27, 265.95 and 81.12

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Solution

The fourth proportional to 177.27, 265.95 and 81.12 is: 121.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.27 : 265.95 = 81.12 : x
  2. Step 2: Convert to fraction form
    177.27/265.95 = 81.12/x
  3. Step 3: Cross multiply
    177.27x = 265.95 × 81.12
  4. Step 4: Simplify right side
    177.27x = 21,573.86
  5. Step 5: Solve for x
    x = 21,573.86/177.27
  6. Step 6: Final answer
    x = 121.70

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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.