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Finding the Fourth Proportional to 131.97, 181.49 and 106.77

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Solution

The fourth proportional to 131.97, 181.49 and 106.77 is: 146.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.97 : 181.49 = 106.77 : x
  2. Step 2: Convert to fraction form
    131.97/181.49 = 106.77/x
  3. Step 3: Cross multiply
    131.97x = 181.49 × 106.77
  4. Step 4: Simplify right side
    131.97x = 19,377.69
  5. Step 5: Solve for x
    x = 19,377.69/131.97
  6. Step 6: Final answer
    x = 146.83

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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.