Finding the Fourth Proportional to 2,129,990,521.36, 2,939,678,918.61 and 1,225,727,872.18
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Solution
The fourth proportional to 2,129,990,521.36, 2,939,678,918.61 and 1,225,727,872.18 is: 1,691,672,497.91
Step by Step Solution
- Step 1: Write the proportion equation
2,129,990,521.36 : 2,939,678,918.61 = 1,225,727,872.18 : x - Step 2: Convert to fraction form
2,129,990,521.36/2,939,678,918.61 = 1,225,727,872.18/x - Step 3: Cross multiply
2,129,990,521.36x = 2,939,678,918.61 × 1,225,727,872.18 - Step 4: Simplify right side
2,129,990,521.36x = 3,603,246,385,800,239,104 - Step 5: Solve for x
x = 3,603,246,385,800,239,104/2,129,990,521.36 - Step 6: Final answer
x = 1,691,672,497.91
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.