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Finding the Fourth Proportional to 117.33, 175.07 and 105.81

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Solution

The fourth proportional to 117.33, 175.07 and 105.81 is: 157.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.33 : 175.07 = 105.81 : x
  2. Step 2: Convert to fraction form
    117.33/175.07 = 105.81/x
  3. Step 3: Cross multiply
    117.33x = 175.07 × 105.81
  4. Step 4: Simplify right side
    117.33x = 18,522.75
  5. Step 5: Solve for x
    x = 18,522.75/117.33
  6. Step 6: Final answer
    x = 157.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.