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Finding the Fourth Proportional to 131.52, 197.39 and 73.79

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Solution

The fourth proportional to 131.52, 197.39 and 73.79 is: 110.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.52 : 197.39 = 73.79 : x
  2. Step 2: Convert to fraction form
    131.52/197.39 = 73.79/x
  3. Step 3: Cross multiply
    131.52x = 197.39 × 73.79
  4. Step 4: Simplify right side
    131.52x = 14,564.05
  5. Step 5: Solve for x
    x = 14,564.05/131.52
  6. Step 6: Final answer
    x = 110.74

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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.