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Finding the Fourth Proportional to 137.40, 188.60 and 131.46

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Solution

The fourth proportional to 137.40, 188.60 and 131.46 is: 180.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.40 : 188.60 = 131.46 : x
  2. Step 2: Convert to fraction form
    137.40/188.60 = 131.46/x
  3. Step 3: Cross multiply
    137.40x = 188.60 × 131.46
  4. Step 4: Simplify right side
    137.40x = 24,791.99
  5. Step 5: Solve for x
    x = 24,791.99/137.40
  6. Step 6: Final answer
    x = 180.44

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.