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Finding the Fourth Proportional to 133.30, 183.71 and 118.21

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Solution

The fourth proportional to 133.30, 183.71 and 118.21 is: 162.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.30 : 183.71 = 118.21 : x
  2. Step 2: Convert to fraction form
    133.30/183.71 = 118.21/x
  3. Step 3: Cross multiply
    133.30x = 183.71 × 118.21
  4. Step 4: Simplify right side
    133.30x = 21,716.36
  5. Step 5: Solve for x
    x = 21,716.36/133.30
  6. Step 6: Final answer
    x = 162.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.