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Finding the Fourth Proportional to 183.91, 275.56 and 129.71

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Solution

The fourth proportional to 183.91, 275.56 and 129.71 is: 194.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.91 : 275.56 = 129.71 : x
  2. Step 2: Convert to fraction form
    183.91/275.56 = 129.71/x
  3. Step 3: Cross multiply
    183.91x = 275.56 × 129.71
  4. Step 4: Simplify right side
    183.91x = 35,742.89
  5. Step 5: Solve for x
    x = 35,742.89/183.91
  6. Step 6: Final answer
    x = 194.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.