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Finding the Fourth Proportional to 166.15, 229.26 and 103.99

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Solution

The fourth proportional to 166.15, 229.26 and 103.99 is: 143.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.15 : 229.26 = 103.99 : x
  2. Step 2: Convert to fraction form
    166.15/229.26 = 103.99/x
  3. Step 3: Cross multiply
    166.15x = 229.26 × 103.99
  4. Step 4: Simplify right side
    166.15x = 23,840.75
  5. Step 5: Solve for x
    x = 23,840.75/166.15
  6. Step 6: Final answer
    x = 143.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.