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Finding the Fourth Proportional to 224.05, 309.21 and 136.71

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Solution

The fourth proportional to 224.05, 309.21 and 136.71 is: 188.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.05 : 309.21 = 136.71 : x
  2. Step 2: Convert to fraction form
    224.05/309.21 = 136.71/x
  3. Step 3: Cross multiply
    224.05x = 309.21 × 136.71
  4. Step 4: Simplify right side
    224.05x = 42,272.10
  5. Step 5: Solve for x
    x = 42,272.10/224.05
  6. Step 6: Final answer
    x = 188.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.