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Finding the Fourth Proportional to 166.26, 229.45 and 99.93

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Solution

The fourth proportional to 166.26, 229.45 and 99.93 is: 137.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.26 : 229.45 = 99.93 : x
  2. Step 2: Convert to fraction form
    166.26/229.45 = 99.93/x
  3. Step 3: Cross multiply
    166.26x = 229.45 × 99.93
  4. Step 4: Simplify right side
    166.26x = 22,928.94
  5. Step 5: Solve for x
    x = 22,928.94/166.26
  6. Step 6: Final answer
    x = 137.91

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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.