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Finding the Fourth Proportional to 176.11, 243.11 and 129.48

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Solution

The fourth proportional to 176.11, 243.11 and 129.48 is: 178.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.11 : 243.11 = 129.48 : x
  2. Step 2: Convert to fraction form
    176.11/243.11 = 129.48/x
  3. Step 3: Cross multiply
    176.11x = 243.11 × 129.48
  4. Step 4: Simplify right side
    176.11x = 31,477.93
  5. Step 5: Solve for x
    x = 31,477.93/176.11
  6. Step 6: Final answer
    x = 178.74

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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.