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Finding the Fourth Proportional to 177.31, 265.96 and 79.79

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Solution

The fourth proportional to 177.31, 265.96 and 79.79 is: 119.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.31 : 265.96 = 79.79 : x
  2. Step 2: Convert to fraction form
    177.31/265.96 = 79.79/x
  3. Step 3: Cross multiply
    177.31x = 265.96 × 79.79
  4. Step 4: Simplify right side
    177.31x = 21,220.95
  5. Step 5: Solve for x
    x = 21,220.95/177.31
  6. Step 6: Final answer
    x = 119.68

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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.