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Finding the Fourth Proportional to 166.02, 229.15 and 103.90

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Solution

The fourth proportional to 166.02, 229.15 and 103.90 is: 143.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.02 : 229.15 = 103.90 : x
  2. Step 2: Convert to fraction form
    166.02/229.15 = 103.90/x
  3. Step 3: Cross multiply
    166.02x = 229.15 × 103.90
  4. Step 4: Simplify right side
    166.02x = 23,808.69
  5. Step 5: Solve for x
    x = 23,808.69/166.02
  6. Step 6: Final answer
    x = 143.41

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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.