Finding the Fourth Proportional to 137,678,418.90, 206,517,628.35 and 76,456,415.70
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Solution
The fourth proportional to 137,678,418.90, 206,517,628.35 and 76,456,415.70 is: 114,684,623.55
Step by Step Solution
- Step 1: Write the proportion equation
137,678,418.90 : 206,517,628.35 = 76,456,415.70 : x - Step 2: Convert to fraction form
137,678,418.90/206,517,628.35 = 76,456,415.70/x - Step 3: Cross multiply
137,678,418.90x = 206,517,628.35 × 76,456,415.70 - Step 4: Simplify right side
137,678,418.90x = 15,789,597,642,505,706 - Step 5: Solve for x
x = 15,789,597,642,505,706/137,678,418.90 - Step 6: Final answer
x = 114,684,623.55
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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.