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Finding the Fourth Proportional to 166.86, 229.86 and 130.05

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Solution

The fourth proportional to 166.86, 229.86 and 130.05 is: 179.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.86 : 229.86 = 130.05 : x
  2. Step 2: Convert to fraction form
    166.86/229.86 = 130.05/x
  3. Step 3: Cross multiply
    166.86x = 229.86 × 130.05
  4. Step 4: Simplify right side
    166.86x = 29,893.29
  5. Step 5: Solve for x
    x = 29,893.29/166.86
  6. Step 6: Final answer
    x = 179.15

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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.