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Finding the Fourth Proportional to 133.12, 184.16 and 107.84

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Solution

The fourth proportional to 133.12, 184.16 and 107.84 is: 149.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.12 : 184.16 = 107.84 : x
  2. Step 2: Convert to fraction form
    133.12/184.16 = 107.84/x
  3. Step 3: Cross multiply
    133.12x = 184.16 × 107.84
  4. Step 4: Simplify right side
    133.12x = 19,859.81
  5. Step 5: Solve for x
    x = 19,859.81/133.12
  6. Step 6: Final answer
    x = 149.19

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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.