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Finding the Fourth Proportional to 193.16, 289.83 and 120.98

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Solution

The fourth proportional to 193.16, 289.83 and 120.98 is: 181.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.16 : 289.83 = 120.98 : x
  2. Step 2: Convert to fraction form
    193.16/289.83 = 120.98/x
  3. Step 3: Cross multiply
    193.16x = 289.83 × 120.98
  4. Step 4: Simplify right side
    193.16x = 35,063.63
  5. Step 5: Solve for x
    x = 35,063.63/193.16
  6. Step 6: Final answer
    x = 181.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.