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Finding the Fourth Proportional to 131.87, 197.76 and 50.74

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Solution

The fourth proportional to 131.87, 197.76 and 50.74 is: 76.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.87 : 197.76 = 50.74 : x
  2. Step 2: Convert to fraction form
    131.87/197.76 = 50.74/x
  3. Step 3: Cross multiply
    131.87x = 197.76 × 50.74
  4. Step 4: Simplify right side
    131.87x = 10,034.34
  5. Step 5: Solve for x
    x = 10,034.34/131.87
  6. Step 6: Final answer
    x = 76.09

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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.