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Finding the Fourth Proportional to 156.44, 235.72 and 131.27

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Solution

The fourth proportional to 156.44, 235.72 and 131.27 is: 197.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.44 : 235.72 = 131.27 : x
  2. Step 2: Convert to fraction form
    156.44/235.72 = 131.27/x
  3. Step 3: Cross multiply
    156.44x = 235.72 × 131.27
  4. Step 4: Simplify right side
    156.44x = 30,941.95
  5. Step 5: Solve for x
    x = 30,941.95/156.44
  6. Step 6: Final answer
    x = 197.78

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.