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Finding the Fourth Proportional to 133.74, 200.40 and 106.35

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Solution

The fourth proportional to 133.74, 200.40 and 106.35 is: 159.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.74 : 200.40 = 106.35 : x
  2. Step 2: Convert to fraction form
    133.74/200.40 = 106.35/x
  3. Step 3: Cross multiply
    133.74x = 200.40 × 106.35
  4. Step 4: Simplify right side
    133.74x = 21,312.54
  5. Step 5: Solve for x
    x = 21,312.54/133.74
  6. Step 6: Final answer
    x = 159.36

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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.