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Finding the Fourth Proportional to 103,105.20, 154,672.20 and 43,940.40

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Solution

The fourth proportional to 103,105.20, 154,672.20 and 43,940.40 is: 65,916.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,105.20 : 154,672.20 = 43,940.40 : x
  2. Step 2: Convert to fraction form
    103,105.20/154,672.20 = 43,940.40/x
  3. Step 3: Cross multiply
    103,105.20x = 154,672.20 × 43,940.40
  4. Step 4: Simplify right side
    103,105.20x = 6,796,358,336.88
  5. Step 5: Solve for x
    x = 6,796,358,336.88/103,105.20
  6. Step 6: Final answer
    x = 65,916.74

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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.