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Finding the Fourth Proportional to 170.92, 235.80 and 108.64

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Solution

The fourth proportional to 170.92, 235.80 and 108.64 is: 149.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.92 : 235.80 = 108.64 : x
  2. Step 2: Convert to fraction form
    170.92/235.80 = 108.64/x
  3. Step 3: Cross multiply
    170.92x = 235.80 × 108.64
  4. Step 4: Simplify right side
    170.92x = 25,617.31
  5. Step 5: Solve for x
    x = 25,617.31/170.92
  6. Step 6: Final answer
    x = 149.88

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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.