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Finding the Fourth Proportional to 131.40, 195.98 and 126.81

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Solution

The fourth proportional to 131.40, 195.98 and 126.81 is: 189.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.40 : 195.98 = 126.81 : x
  2. Step 2: Convert to fraction form
    131.40/195.98 = 126.81/x
  3. Step 3: Cross multiply
    131.40x = 195.98 × 126.81
  4. Step 4: Simplify right side
    131.40x = 24,851.59
  5. Step 5: Solve for x
    x = 24,851.59/131.40
  6. Step 6: Final answer
    x = 189.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.