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Finding the Fourth Proportional to 127.26, 191.19 and 120.87

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Solution

The fourth proportional to 127.26, 191.19 and 120.87 is: 181.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.26 : 191.19 = 120.87 : x
  2. Step 2: Convert to fraction form
    127.26/191.19 = 120.87/x
  3. Step 3: Cross multiply
    127.26x = 191.19 × 120.87
  4. Step 4: Simplify right side
    127.26x = 23,109.14
  5. Step 5: Solve for x
    x = 23,109.14/127.26
  6. Step 6: Final answer
    x = 181.59

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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.