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Finding the Fourth Proportional to 176.50, 264.95 and 80.31

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Solution

The fourth proportional to 176.50, 264.95 and 80.31 is: 120.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.50 : 264.95 = 80.31 : x
  2. Step 2: Convert to fraction form
    176.50/264.95 = 80.31/x
  3. Step 3: Cross multiply
    176.50x = 264.95 × 80.31
  4. Step 4: Simplify right side
    176.50x = 21,278.13
  5. Step 5: Solve for x
    x = 21,278.13/176.50
  6. Step 6: Final answer
    x = 120.56

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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.