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Finding the Fourth Proportional to 176.93, 265.17 and 85.66

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Solution

The fourth proportional to 176.93, 265.17 and 85.66 is: 128.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.93 : 265.17 = 85.66 : x
  2. Step 2: Convert to fraction form
    176.93/265.17 = 85.66/x
  3. Step 3: Cross multiply
    176.93x = 265.17 × 85.66
  4. Step 4: Simplify right side
    176.93x = 22,714.46
  5. Step 5: Solve for x
    x = 22,714.46/176.93
  6. Step 6: Final answer
    x = 128.38

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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.