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Finding the Fourth Proportional to 170.82, 235.80 and 111.83

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Solution

The fourth proportional to 170.82, 235.80 and 111.83 is: 154.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.82 : 235.80 = 111.83 : x
  2. Step 2: Convert to fraction form
    170.82/235.80 = 111.83/x
  3. Step 3: Cross multiply
    170.82x = 235.80 × 111.83
  4. Step 4: Simplify right side
    170.82x = 26,369.51
  5. Step 5: Solve for x
    x = 26,369.51/170.82
  6. Step 6: Final answer
    x = 154.37

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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.