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Finding the Fourth Proportional to 127.62, 175.26 and 109.20

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Solution

The fourth proportional to 127.62, 175.26 and 109.20 is: 149.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.62 : 175.26 = 109.20 : x
  2. Step 2: Convert to fraction form
    127.62/175.26 = 109.20/x
  3. Step 3: Cross multiply
    127.62x = 175.26 × 109.20
  4. Step 4: Simplify right side
    127.62x = 19,138.39
  5. Step 5: Solve for x
    x = 19,138.39/127.62
  6. Step 6: Final answer
    x = 149.96

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.