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Finding the Fourth Proportional to 176.74, 264.97 and 85.53

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Solution

The fourth proportional to 176.74, 264.97 and 85.53 is: 128.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.74 : 264.97 = 85.53 : x
  2. Step 2: Convert to fraction form
    176.74/264.97 = 85.53/x
  3. Step 3: Cross multiply
    176.74x = 264.97 × 85.53
  4. Step 4: Simplify right side
    176.74x = 22,662.88
  5. Step 5: Solve for x
    x = 22,662.88/176.74
  6. Step 6: Final answer
    x = 128.23

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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.