Finding the Fourth Proportional to 203,990,515.20, 305,985,772.80 and 172,422,919.80
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Solution
The fourth proportional to 203,990,515.20, 305,985,772.80 and 172,422,919.80 is: 258,634,379.70
Step by Step Solution
- Step 1: Write the proportion equation
203,990,515.20 : 305,985,772.80 = 172,422,919.80 : x - Step 2: Convert to fraction form
203,990,515.20/305,985,772.80 = 172,422,919.80/x - Step 3: Cross multiply
203,990,515.20x = 305,985,772.80 × 172,422,919.80 - Step 4: Simplify right side
203,990,515.20x = 52,758,960,363,435,424 - Step 5: Solve for x
x = 52,758,960,363,435,424/203,990,515.20 - Step 6: Final answer
x = 258,634,379.70
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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.