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Finding the Fourth Proportional to 183.91, 275.66 and 87.61

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Solution

The fourth proportional to 183.91, 275.66 and 87.61 is: 131.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.91 : 275.66 = 87.61 : x
  2. Step 2: Convert to fraction form
    183.91/275.66 = 87.61/x
  3. Step 3: Cross multiply
    183.91x = 275.66 × 87.61
  4. Step 4: Simplify right side
    183.91x = 24,150.13
  5. Step 5: Solve for x
    x = 24,150.13/183.91
  6. Step 6: Final answer
    x = 131.31

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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.