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Finding the Fourth Proportional to 127.48, 190.40 and 109.26

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Solution

The fourth proportional to 127.48, 190.40 and 109.26 is: 163.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.48 : 190.40 = 109.26 : x
  2. Step 2: Convert to fraction form
    127.48/190.40 = 109.26/x
  3. Step 3: Cross multiply
    127.48x = 190.40 × 109.26
  4. Step 4: Simplify right side
    127.48x = 20,803.10
  5. Step 5: Solve for x
    x = 20,803.10/127.48
  6. Step 6: Final answer
    x = 163.19

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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.