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Finding the Fourth Proportional to 131.29, 181 and 109.08

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Solution

The fourth proportional to 131.29, 181 and 109.08 is: 150.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.29 : 181 = 109.08 : x
  2. Step 2: Convert to fraction form
    131.29/181 = 109.08/x
  3. Step 3: Cross multiply
    131.29x = 181 × 109.08
  4. Step 4: Simplify right side
    131.29x = 19,743.48
  5. Step 5: Solve for x
    x = 19,743.48/131.29
  6. Step 6: Final answer
    x = 150.38

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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.