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Finding the Fourth Proportional to 224.10, 309.15 and 136.76

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Solution

The fourth proportional to 224.10, 309.15 and 136.76 is: 188.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.10 : 309.15 = 136.76 : x
  2. Step 2: Convert to fraction form
    224.10/309.15 = 136.76/x
  3. Step 3: Cross multiply
    224.10x = 309.15 × 136.76
  4. Step 4: Simplify right side
    224.10x = 42,277.81
  5. Step 5: Solve for x
    x = 42,277.81/224.10
  6. Step 6: Final answer
    x = 188.66

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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.