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Finding the Fourth Proportional to 161.38, 222.58 and 103.06

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Solution

The fourth proportional to 161.38, 222.58 and 103.06 is: 142.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.38 : 222.58 = 103.06 : x
  2. Step 2: Convert to fraction form
    161.38/222.58 = 103.06/x
  3. Step 3: Cross multiply
    161.38x = 222.58 × 103.06
  4. Step 4: Simplify right side
    161.38x = 22,939.09
  5. Step 5: Solve for x
    x = 22,939.09/161.38
  6. Step 6: Final answer
    x = 142.14

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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.