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Finding the Fourth Proportional to 184.15, 275.91 and 86.59

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Solution

The fourth proportional to 184.15, 275.91 and 86.59 is: 129.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    184.15 : 275.91 = 86.59 : x
  2. Step 2: Convert to fraction form
    184.15/275.91 = 86.59/x
  3. Step 3: Cross multiply
    184.15x = 275.91 × 86.59
  4. Step 4: Simplify right side
    184.15x = 23,891.05
  5. Step 5: Solve for x
    x = 23,891.05/184.15
  6. Step 6: Final answer
    x = 129.74

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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.