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Finding the Fourth Proportional to 133.72, 201.58 and 125.20

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Solution

The fourth proportional to 133.72, 201.58 and 125.20 is: 188.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.72 : 201.58 = 125.20 : x
  2. Step 2: Convert to fraction form
    133.72/201.58 = 125.20/x
  3. Step 3: Cross multiply
    133.72x = 201.58 × 125.20
  4. Step 4: Simplify right side
    133.72x = 25,237.82
  5. Step 5: Solve for x
    x = 25,237.82/133.72
  6. Step 6: Final answer
    x = 188.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.