Finding the Fourth Proportional to 128,278,874.26, 192,405,070.99 and 87,044,508.60
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Solution
The fourth proportional to 128,278,874.26, 192,405,070.99 and 87,044,508.60 is: 130,557,778.54
Step by Step Solution
- Step 1: Write the proportion equation
128,278,874.26 : 192,405,070.99 = 87,044,508.60 : x - Step 2: Convert to fraction form
128,278,874.26/192,405,070.99 = 87,044,508.60/x - Step 3: Cross multiply
128,278,874.26x = 192,405,070.99 × 87,044,508.60 - Step 4: Simplify right side
128,278,874.26x = 16,747,804,856,472,666 - Step 5: Solve for x
x = 16,747,804,856,472,666/128,278,874.26 - Step 6: Final answer
x = 130,557,778.54
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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.