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Finding the Fourth Proportional to 176.73, 265.12 and 85.43

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Solution

The fourth proportional to 176.73, 265.12 and 85.43 is: 128.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.73 : 265.12 = 85.43 : x
  2. Step 2: Convert to fraction form
    176.73/265.12 = 85.43/x
  3. Step 3: Cross multiply
    176.73x = 265.12 × 85.43
  4. Step 4: Simplify right side
    176.73x = 22,649.39
  5. Step 5: Solve for x
    x = 22,649.39/176.73
  6. Step 6: Final answer
    x = 128.16

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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.