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Finding the Fourth Proportional to 131.39, 197.15 and 73.57

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Solution

The fourth proportional to 131.39, 197.15 and 73.57 is: 110.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.39 : 197.15 = 73.57 : x
  2. Step 2: Convert to fraction form
    131.39/197.15 = 73.57/x
  3. Step 3: Cross multiply
    131.39x = 197.15 × 73.57
  4. Step 4: Simplify right side
    131.39x = 14,504.33
  5. Step 5: Solve for x
    x = 14,504.33/131.39
  6. Step 6: Final answer
    x = 110.39

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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.