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Finding the Fourth Proportional to 127.48, 190.39 and 109.25

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Solution

The fourth proportional to 127.48, 190.39 and 109.25 is: 163.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.48 : 190.39 = 109.25 : x
  2. Step 2: Convert to fraction form
    127.48/190.39 = 109.25/x
  3. Step 3: Cross multiply
    127.48x = 190.39 × 109.25
  4. Step 4: Simplify right side
    127.48x = 20,800.11
  5. Step 5: Solve for x
    x = 20,800.11/127.48
  6. Step 6: Final answer
    x = 163.16

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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.