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Finding the Fourth Proportional to 130.95, 197.58 and 126.21

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Solution

The fourth proportional to 130.95, 197.58 and 126.21 is: 190.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.95 : 197.58 = 126.21 : x
  2. Step 2: Convert to fraction form
    130.95/197.58 = 126.21/x
  3. Step 3: Cross multiply
    130.95x = 197.58 × 126.21
  4. Step 4: Simplify right side
    130.95x = 24,936.57
  5. Step 5: Solve for x
    x = 24,936.57/130.95
  6. Step 6: Final answer
    x = 190.43

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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.