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Finding the Fourth Proportional to 143.05, 197.28 and 101.62

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Solution

The fourth proportional to 143.05, 197.28 and 101.62 is: 140.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.05 : 197.28 = 101.62 : x
  2. Step 2: Convert to fraction form
    143.05/197.28 = 101.62/x
  3. Step 3: Cross multiply
    143.05x = 197.28 × 101.62
  4. Step 4: Simplify right side
    143.05x = 20,047.59
  5. Step 5: Solve for x
    x = 20,047.59/143.05
  6. Step 6: Final answer
    x = 140.14

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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.