Finding the Fourth Proportional to 68,378,807.80, 102,568,211.70 and 20,509,751.80
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Solution
The fourth proportional to 68,378,807.80, 102,568,211.70 and 20,509,751.80 is: 30,764,627.70
Step by Step Solution
- Step 1: Write the proportion equation
68,378,807.80 : 102,568,211.70 = 20,509,751.80 : x - Step 2: Convert to fraction form
68,378,807.80/102,568,211.70 = 20,509,751.80/x - Step 3: Cross multiply
68,378,807.80x = 102,568,211.70 × 20,509,751.80 - Step 4: Simplify right side
68,378,807.80x = 2,103,648,564,536,856.25 - Step 5: Solve for x
x = 2,103,648,564,536,856.25/68,378,807.80 - Step 6: Final answer
x = 30,764,627.70
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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.