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Finding the Fourth Proportional to 143.27, 197.62 and 98.93

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Solution

The fourth proportional to 143.27, 197.62 and 98.93 is: 136.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.27 : 197.62 = 98.93 : x
  2. Step 2: Convert to fraction form
    143.27/197.62 = 98.93/x
  3. Step 3: Cross multiply
    143.27x = 197.62 × 98.93
  4. Step 4: Simplify right side
    143.27x = 19,550.79
  5. Step 5: Solve for x
    x = 19,550.79/143.27
  6. Step 6: Final answer
    x = 136.46

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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.