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Finding the Fourth Proportional to 169.83, 234.42 and 99.93

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Solution

The fourth proportional to 169.83, 234.42 and 99.93 is: 137.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.83 : 234.42 = 99.93 : x
  2. Step 2: Convert to fraction form
    169.83/234.42 = 99.93/x
  3. Step 3: Cross multiply
    169.83x = 234.42 × 99.93
  4. Step 4: Simplify right side
    169.83x = 23,425.59
  5. Step 5: Solve for x
    x = 23,425.59/169.83
  6. Step 6: Final answer
    x = 137.94

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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.