Finding the Fourth Proportional to 7,178,958.68, 9,906,993.60 and 3,915,842.88
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Solution
The fourth proportional to 7,178,958.68, 9,906,993.60 and 3,915,842.88 is: 5,403,879.88
Step by Step Solution
- Step 1: Write the proportion equation
7,178,958.68 : 9,906,993.60 = 3,915,842.88 : x - Step 2: Convert to fraction form
7,178,958.68/9,906,993.60 = 3,915,842.88/x - Step 3: Cross multiply
7,178,958.68x = 9,906,993.60 × 3,915,842.88 - Step 4: Simplify right side
7,178,958.68x = 38,794,230,350,765.56 - Step 5: Solve for x
x = 38,794,230,350,765.56/7,178,958.68 - Step 6: Final answer
x = 5,403,879.88
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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.