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Finding the Fourth Proportional to 45,379.75, 68,072.87 and 12,099.64

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Solution

The fourth proportional to 45,379.75, 68,072.87 and 12,099.64 is: 18,150.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,379.75 : 68,072.87 = 12,099.64 : x
  2. Step 2: Convert to fraction form
    45,379.75/68,072.87 = 12,099.64/x
  3. Step 3: Cross multiply
    45,379.75x = 68,072.87 × 12,099.64
  4. Step 4: Simplify right side
    45,379.75x = 823,657,220.77
  5. Step 5: Solve for x
    x = 823,657,220.77/45,379.75
  6. Step 6: Final answer
    x = 18,150.33

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1.5x scale

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.