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Finding the Fourth Proportional to 171.06, 235.98 and 129.60

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Solution

The fourth proportional to 171.06, 235.98 and 129.60 is: 178.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.06 : 235.98 = 129.60 : x
  2. Step 2: Convert to fraction form
    171.06/235.98 = 129.60/x
  3. Step 3: Cross multiply
    171.06x = 235.98 × 129.60
  4. Step 4: Simplify right side
    171.06x = 30,583.01
  5. Step 5: Solve for x
    x = 30,583.01/171.06
  6. Step 6: Final answer
    x = 178.79

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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.