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Finding the Fourth Proportional to 132.44, 182.70 and 85.74

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Solution

The fourth proportional to 132.44, 182.70 and 85.74 is: 118.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.44 : 182.70 = 85.74 : x
  2. Step 2: Convert to fraction form
    132.44/182.70 = 85.74/x
  3. Step 3: Cross multiply
    132.44x = 182.70 × 85.74
  4. Step 4: Simplify right side
    132.44x = 15,664.70
  5. Step 5: Solve for x
    x = 15,664.70/132.44
  6. Step 6: Final answer
    x = 118.28

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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.