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Finding the Fourth Proportional to 143.90, 197.26 and 141.74

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Solution

The fourth proportional to 143.90, 197.26 and 141.74 is: 194.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.90 : 197.26 = 141.74 : x
  2. Step 2: Convert to fraction form
    143.90/197.26 = 141.74/x
  3. Step 3: Cross multiply
    143.90x = 197.26 × 141.74
  4. Step 4: Simplify right side
    143.90x = 27,959.63
  5. Step 5: Solve for x
    x = 27,959.63/143.90
  6. Step 6: Final answer
    x = 194.30

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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.