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Finding the Fourth Proportional to 113.45, 171.01 and 110.72

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Solution

The fourth proportional to 113.45, 171.01 and 110.72 is: 166.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.45 : 171.01 = 110.72 : x
  2. Step 2: Convert to fraction form
    113.45/171.01 = 110.72/x
  3. Step 3: Cross multiply
    113.45x = 171.01 × 110.72
  4. Step 4: Simplify right side
    113.45x = 18,933.83
  5. Step 5: Solve for x
    x = 18,933.83/113.45
  6. Step 6: Final answer
    x = 166.89

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.