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Finding the Fourth Proportional to 170.92, 235.76 and 129.63

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Solution

The fourth proportional to 170.92, 235.76 and 129.63 is: 178.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.92 : 235.76 = 129.63 : x
  2. Step 2: Convert to fraction form
    170.92/235.76 = 129.63/x
  3. Step 3: Cross multiply
    170.92x = 235.76 × 129.63
  4. Step 4: Simplify right side
    170.92x = 30,561.57
  5. Step 5: Solve for x
    x = 30,561.57/170.92
  6. Step 6: Final answer
    x = 178.81

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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.