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Finding the Fourth Proportional to 156.96, 234.81 and 111.33

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Solution

The fourth proportional to 156.96, 234.81 and 111.33 is: 166.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.96 : 234.81 = 111.33 : x
  2. Step 2: Convert to fraction form
    156.96/234.81 = 111.33/x
  3. Step 3: Cross multiply
    156.96x = 234.81 × 111.33
  4. Step 4: Simplify right side
    156.96x = 26,141.40
  5. Step 5: Solve for x
    x = 26,141.40/156.96
  6. Step 6: Final answer
    x = 166.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.