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Finding the Fourth Proportional to 102,751, 154,126.50 and 28,879

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Solution

The fourth proportional to 102,751, 154,126.50 and 28,879 is: 43,318.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,751 : 154,126.50 = 28,879 : x
  2. Step 2: Convert to fraction form
    102,751/154,126.50 = 28,879/x
  3. Step 3: Cross multiply
    102,751x = 154,126.50 × 28,879
  4. Step 4: Simplify right side
    102,751x = 4,451,019,193.50
  5. Step 5: Solve for x
    x = 4,451,019,193.50/102,751
  6. Step 6: Final answer
    x = 43,318.50

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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.