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Finding the Fourth Proportional to 143.40, 197.81 and 94.26

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Solution

The fourth proportional to 143.40, 197.81 and 94.26 is: 130.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.40 : 197.81 = 94.26 : x
  2. Step 2: Convert to fraction form
    143.40/197.81 = 94.26/x
  3. Step 3: Cross multiply
    143.40x = 197.81 × 94.26
  4. Step 4: Simplify right side
    143.40x = 18,645.57
  5. Step 5: Solve for x
    x = 18,645.57/143.40
  6. Step 6: Final answer
    x = 130.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.