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Finding the Fourth Proportional to 137.08, 206.84 and 131.46

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Solution

The fourth proportional to 137.08, 206.84 and 131.46 is: 198.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.08 : 206.84 = 131.46 : x
  2. Step 2: Convert to fraction form
    137.08/206.84 = 131.46/x
  3. Step 3: Cross multiply
    137.08x = 206.84 × 131.46
  4. Step 4: Simplify right side
    137.08x = 27,191.19
  5. Step 5: Solve for x
    x = 27,191.19/137.08
  6. Step 6: Final answer
    x = 198.36

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.