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Finding the Fourth Proportional to 149.56, 224.23 and 72.45

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Solution

The fourth proportional to 149.56, 224.23 and 72.45 is: 108.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.56 : 224.23 = 72.45 : x
  2. Step 2: Convert to fraction form
    149.56/224.23 = 72.45/x
  3. Step 3: Cross multiply
    149.56x = 224.23 × 72.45
  4. Step 4: Simplify right side
    149.56x = 16,244.44
  5. Step 5: Solve for x
    x = 16,244.44/149.56
  6. Step 6: Final answer
    x = 108.62

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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.