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Finding the Fourth Proportional to 193.06, 289.36 and 71.25

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Solution

The fourth proportional to 193.06, 289.36 and 71.25 is: 106.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.06 : 289.36 = 71.25 : x
  2. Step 2: Convert to fraction form
    193.06/289.36 = 71.25/x
  3. Step 3: Cross multiply
    193.06x = 289.36 × 71.25
  4. Step 4: Simplify right side
    193.06x = 20,616.90
  5. Step 5: Solve for x
    x = 20,616.90/193.06
  6. Step 6: Final answer
    x = 106.79

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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.