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Finding the Fourth Proportional to 134.22, 200.16 and 128.01

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Solution

The fourth proportional to 134.22, 200.16 and 128.01 is: 190.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.22 : 200.16 = 128.01 : x
  2. Step 2: Convert to fraction form
    134.22/200.16 = 128.01/x
  3. Step 3: Cross multiply
    134.22x = 200.16 × 128.01
  4. Step 4: Simplify right side
    134.22x = 25,622.48
  5. Step 5: Solve for x
    x = 25,622.48/134.22
  6. Step 6: Final answer
    x = 190.90

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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.