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Finding the Fourth Proportional to 176.89, 243.91 and 120.91

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Solution

The fourth proportional to 176.89, 243.91 and 120.91 is: 166.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.89 : 243.91 = 120.91 : x
  2. Step 2: Convert to fraction form
    176.89/243.91 = 120.91/x
  3. Step 3: Cross multiply
    176.89x = 243.91 × 120.91
  4. Step 4: Simplify right side
    176.89x = 29,491.16
  5. Step 5: Solve for x
    x = 29,491.16/176.89
  6. Step 6: Final answer
    x = 166.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.