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Finding the Fourth Proportional to 131.56, 197.55 and 102.74

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Solution

The fourth proportional to 131.56, 197.55 and 102.74 is: 154.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.56 : 197.55 = 102.74 : x
  2. Step 2: Convert to fraction form
    131.56/197.55 = 102.74/x
  3. Step 3: Cross multiply
    131.56x = 197.55 × 102.74
  4. Step 4: Simplify right side
    131.56x = 20,297.11
  5. Step 5: Solve for x
    x = 20,297.11/131.56
  6. Step 6: Final answer
    x = 154.28

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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.