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Finding the Fourth Proportional to 102,763, 154,144.50 and 28,891

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Solution

The fourth proportional to 102,763, 154,144.50 and 28,891 is: 43,336.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,763 : 154,144.50 = 28,891 : x
  2. Step 2: Convert to fraction form
    102,763/154,144.50 = 28,891/x
  3. Step 3: Cross multiply
    102,763x = 154,144.50 × 28,891
  4. Step 4: Simplify right side
    102,763x = 4,453,388,749.50
  5. Step 5: Solve for x
    x = 4,453,388,749.50/102,763
  6. Step 6: Final answer
    x = 43,336.50

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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.