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Finding the Fourth Proportional to 132.58, 183.84 and 128.44

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Solution

The fourth proportional to 132.58, 183.84 and 128.44 is: 178.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.58 : 183.84 = 128.44 : x
  2. Step 2: Convert to fraction form
    132.58/183.84 = 128.44/x
  3. Step 3: Cross multiply
    132.58x = 183.84 × 128.44
  4. Step 4: Simplify right side
    132.58x = 23,612.41
  5. Step 5: Solve for x
    x = 23,612.41/132.58
  6. Step 6: Final answer
    x = 178.10

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.