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Finding the Fourth Proportional to 127.54, 190.10 and 126.31

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Solution

The fourth proportional to 127.54, 190.10 and 126.31 is: 188.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.54 : 190.10 = 126.31 : x
  2. Step 2: Convert to fraction form
    127.54/190.10 = 126.31/x
  3. Step 3: Cross multiply
    127.54x = 190.10 × 126.31
  4. Step 4: Simplify right side
    127.54x = 24,011.53
  5. Step 5: Solve for x
    x = 24,011.53/127.54
  6. Step 6: Final answer
    x = 188.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.