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Finding the Fourth Proportional to 166.45, 229.78 and 104.31

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Solution

The fourth proportional to 166.45, 229.78 and 104.31 is: 144.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.45 : 229.78 = 104.31 : x
  2. Step 2: Convert to fraction form
    166.45/229.78 = 104.31/x
  3. Step 3: Cross multiply
    166.45x = 229.78 × 104.31
  4. Step 4: Simplify right side
    166.45x = 23,967.83
  5. Step 5: Solve for x
    x = 23,967.83/166.45
  6. Step 6: Final answer
    x = 144.00

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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.