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Finding the Fourth Proportional to 161.30, 240.93 and 138.56

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Solution

The fourth proportional to 161.30, 240.93 and 138.56 is: 206.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.30 : 240.93 = 138.56 : x
  2. Step 2: Convert to fraction form
    161.30/240.93 = 138.56/x
  3. Step 3: Cross multiply
    161.30x = 240.93 × 138.56
  4. Step 4: Simplify right side
    161.30x = 33,382.57
  5. Step 5: Solve for x
    x = 33,382.57/161.30
  6. Step 6: Final answer
    x = 206.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.