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Finding the Fourth Proportional to 190.08, 284.72 and 121.41

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Solution

The fourth proportional to 190.08, 284.72 and 121.41 is: 181.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.08 : 284.72 = 121.41 : x
  2. Step 2: Convert to fraction form
    190.08/284.72 = 121.41/x
  3. Step 3: Cross multiply
    190.08x = 284.72 × 121.41
  4. Step 4: Simplify right side
    190.08x = 34,567.25
  5. Step 5: Solve for x
    x = 34,567.25/190.08
  6. Step 6: Final answer
    x = 181.86

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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.