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Finding the Fourth Proportional to 170.79, 235.82 and 111.79

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Solution

The fourth proportional to 170.79, 235.82 and 111.79 is: 154.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.79 : 235.82 = 111.79 : x
  2. Step 2: Convert to fraction form
    170.79/235.82 = 111.79/x
  3. Step 3: Cross multiply
    170.79x = 235.82 × 111.79
  4. Step 4: Simplify right side
    170.79x = 26,361.76
  5. Step 5: Solve for x
    x = 26,361.76/170.79
  6. Step 6: Final answer
    x = 154.36

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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.