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Finding the Fourth Proportional to 176.70, 265 and 85.22

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Solution

The fourth proportional to 176.70, 265 and 85.22 is: 127.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.70 : 265 = 85.22 : x
  2. Step 2: Convert to fraction form
    176.70/265 = 85.22/x
  3. Step 3: Cross multiply
    176.70x = 265 × 85.22
  4. Step 4: Simplify right side
    176.70x = 22,583.30
  5. Step 5: Solve for x
    x = 22,583.30/176.70
  6. Step 6: Final answer
    x = 127.81

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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.