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Finding the Fourth Proportional to 182.72, 273.76 and 128.36

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Solution

The fourth proportional to 182.72, 273.76 and 128.36 is: 192.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    182.72 : 273.76 = 128.36 : x
  2. Step 2: Convert to fraction form
    182.72/273.76 = 128.36/x
  3. Step 3: Cross multiply
    182.72x = 273.76 × 128.36
  4. Step 4: Simplify right side
    182.72x = 35,139.83
  5. Step 5: Solve for x
    x = 35,139.83/182.72
  6. Step 6: Final answer
    x = 192.32

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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.