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Finding the Fourth Proportional to 149.30, 224.04 and 68.21

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Solution

The fourth proportional to 149.30, 224.04 and 68.21 is: 102.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.30 : 224.04 = 68.21 : x
  2. Step 2: Convert to fraction form
    149.30/224.04 = 68.21/x
  3. Step 3: Cross multiply
    149.30x = 224.04 × 68.21
  4. Step 4: Simplify right side
    149.30x = 15,280.65
  5. Step 5: Solve for x
    x = 15,280.65/149.30
  6. Step 6: Final answer
    x = 102.35

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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.