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Finding the Fourth Proportional to 182.78, 273.93 and 86.36

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Solution

The fourth proportional to 182.78, 273.93 and 86.36 is: 129.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    182.78 : 273.93 = 86.36 : x
  2. Step 2: Convert to fraction form
    182.78/273.93 = 86.36/x
  3. Step 3: Cross multiply
    182.78x = 273.93 × 86.36
  4. Step 4: Simplify right side
    182.78x = 23,656.59
  5. Step 5: Solve for x
    x = 23,656.59/182.78
  6. Step 6: Final answer
    x = 129.43

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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.