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Finding the Fourth Proportional to 143.07, 197.28 and 134.70

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Solution

The fourth proportional to 143.07, 197.28 and 134.70 is: 185.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.07 : 197.28 = 134.70 : x
  2. Step 2: Convert to fraction form
    143.07/197.28 = 134.70/x
  3. Step 3: Cross multiply
    143.07x = 197.28 × 134.70
  4. Step 4: Simplify right side
    143.07x = 26,573.62
  5. Step 5: Solve for x
    x = 26,573.62/143.07
  6. Step 6: Final answer
    x = 185.74

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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.