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Finding the Fourth Proportional to 161.41, 242.51 and 103.66

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Solution

The fourth proportional to 161.41, 242.51 and 103.66 is: 155.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.41 : 242.51 = 103.66 : x
  2. Step 2: Convert to fraction form
    161.41/242.51 = 103.66/x
  3. Step 3: Cross multiply
    161.41x = 242.51 × 103.66
  4. Step 4: Simplify right side
    161.41x = 25,136.86
  5. Step 5: Solve for x
    x = 25,136.86/161.41
  6. Step 6: Final answer
    x = 155.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.