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Finding the Fourth Proportional to 182.69, 274.13 and 86.50

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Solution

The fourth proportional to 182.69, 274.13 and 86.50 is: 129.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    182.69 : 274.13 = 86.50 : x
  2. Step 2: Convert to fraction form
    182.69/274.13 = 86.50/x
  3. Step 3: Cross multiply
    182.69x = 274.13 × 86.50
  4. Step 4: Simplify right side
    182.69x = 23,712.25
  5. Step 5: Solve for x
    x = 23,712.25/182.69
  6. Step 6: Final answer
    x = 129.79

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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.