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Finding the Fourth Proportional to 133.49, 200.54 and 128.32

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Solution

The fourth proportional to 133.49, 200.54 and 128.32 is: 192.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.49 : 200.54 = 128.32 : x
  2. Step 2: Convert to fraction form
    133.49/200.54 = 128.32/x
  3. Step 3: Cross multiply
    133.49x = 200.54 × 128.32
  4. Step 4: Simplify right side
    133.49x = 25,733.11
  5. Step 5: Solve for x
    x = 25,733.11/133.49
  6. Step 6: Final answer
    x = 192.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.