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Finding the Fourth Proportional to 170.76, 235.80 and 111.77

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Solution

The fourth proportional to 170.76, 235.80 and 111.77 is: 154.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.76 : 235.80 = 111.77 : x
  2. Step 2: Convert to fraction form
    170.76/235.80 = 111.77/x
  3. Step 3: Cross multiply
    170.76x = 235.80 × 111.77
  4. Step 4: Simplify right side
    170.76x = 26,354.19
  5. Step 5: Solve for x
    x = 26,354.19/170.76
  6. Step 6: Final answer
    x = 154.33

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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.