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Finding the Fourth Proportional to 161.69, 223.01 and 111.98

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Solution

The fourth proportional to 161.69, 223.01 and 111.98 is: 154.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.69 : 223.01 = 111.98 : x
  2. Step 2: Convert to fraction form
    161.69/223.01 = 111.98/x
  3. Step 3: Cross multiply
    161.69x = 223.01 × 111.98
  4. Step 4: Simplify right side
    161.69x = 24,972.24
  5. Step 5: Solve for x
    x = 24,972.24/161.69
  6. Step 6: Final answer
    x = 154.45

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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.