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Finding the Fourth Proportional to 132.55, 181.30 and 130.42

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Solution

The fourth proportional to 132.55, 181.30 and 130.42 is: 178.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.55 : 181.30 = 130.42 : x
  2. Step 2: Convert to fraction form
    132.55/181.30 = 130.42/x
  3. Step 3: Cross multiply
    132.55x = 181.30 × 130.42
  4. Step 4: Simplify right side
    132.55x = 23,645.15
  5. Step 5: Solve for x
    x = 23,645.15/132.55
  6. Step 6: Final answer
    x = 178.39

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.