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Finding the Fourth Proportional to 129.37, 178.37 and 105.97

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Solution

The fourth proportional to 129.37, 178.37 and 105.97 is: 146.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.37 : 178.37 = 105.97 : x
  2. Step 2: Convert to fraction form
    129.37/178.37 = 105.97/x
  3. Step 3: Cross multiply
    129.37x = 178.37 × 105.97
  4. Step 4: Simplify right side
    129.37x = 18,901.34
  5. Step 5: Solve for x
    x = 18,901.34/129.37
  6. Step 6: Final answer
    x = 146.10

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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.