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Finding the Fourth Proportional to 117.18, 174.89 and 103.48

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Solution

The fourth proportional to 117.18, 174.89 and 103.48 is: 154.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.18 : 174.89 = 103.48 : x
  2. Step 2: Convert to fraction form
    117.18/174.89 = 103.48/x
  3. Step 3: Cross multiply
    117.18x = 174.89 × 103.48
  4. Step 4: Simplify right side
    117.18x = 18,097.44
  5. Step 5: Solve for x
    x = 18,097.44/117.18
  6. Step 6: Final answer
    x = 154.44

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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.