Finding the Fourth Proportional to 78,163.12, 117,243.66 and 18,998.62
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Solution
The fourth proportional to 78,163.12, 117,243.66 and 18,998.62 is: 28,497.68
Step by Step Solution
- Step 1: Write the proportion equation
78,163.12 : 117,243.66 = 18,998.62 : x - Step 2: Convert to fraction form
78,163.12/117,243.66 = 18,998.62/x - Step 3: Cross multiply
78,163.12x = 117,243.66 × 18,998.62 - Step 4: Simplify right side
78,163.12x = 2,227,467,743.75 - Step 5: Solve for x
x = 2,227,467,743.75/78,163.12 - Step 6: Final answer
x = 28,497.68
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Double scale
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Similar ratio
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1.5x scale
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.