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Finding the Fourth Proportional to 190.64, 285.50 and 109.54

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Solution

The fourth proportional to 190.64, 285.50 and 109.54 is: 164.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.64 : 285.50 = 109.54 : x
  2. Step 2: Convert to fraction form
    190.64/285.50 = 109.54/x
  3. Step 3: Cross multiply
    190.64x = 285.50 × 109.54
  4. Step 4: Simplify right side
    190.64x = 31,273.67
  5. Step 5: Solve for x
    x = 31,273.67/190.64
  6. Step 6: Final answer
    x = 164.05

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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.