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Finding the Fourth Proportional to 132.99, 183.56 and 86.42

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Solution

The fourth proportional to 132.99, 183.56 and 86.42 is: 119.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.99 : 183.56 = 86.42 : x
  2. Step 2: Convert to fraction form
    132.99/183.56 = 86.42/x
  3. Step 3: Cross multiply
    132.99x = 183.56 × 86.42
  4. Step 4: Simplify right side
    132.99x = 15,863.26
  5. Step 5: Solve for x
    x = 15,863.26/132.99
  6. Step 6: Final answer
    x = 119.28

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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.