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Finding the Fourth Proportional to 117.54, 175.08 and 112.86

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Solution

The fourth proportional to 117.54, 175.08 and 112.86 is: 168.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.54 : 175.08 = 112.86 : x
  2. Step 2: Convert to fraction form
    117.54/175.08 = 112.86/x
  3. Step 3: Cross multiply
    117.54x = 175.08 × 112.86
  4. Step 4: Simplify right side
    117.54x = 19,759.53
  5. Step 5: Solve for x
    x = 19,759.53/117.54
  6. Step 6: Final answer
    x = 168.11

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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.