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Finding the Fourth Proportional to 132.93, 183.38 and 86.31

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Solution

The fourth proportional to 132.93, 183.38 and 86.31 is: 119.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.93 : 183.38 = 86.31 : x
  2. Step 2: Convert to fraction form
    132.93/183.38 = 86.31/x
  3. Step 3: Cross multiply
    132.93x = 183.38 × 86.31
  4. Step 4: Simplify right side
    132.93x = 15,827.74
  5. Step 5: Solve for x
    x = 15,827.74/132.93
  6. Step 6: Final answer
    x = 119.07

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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.