Finding the Fourth Proportional to 78,639.96, 117,991.26 and 28,723.44
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Solution
The fourth proportional to 78,639.96, 117,991.26 and 28,723.44 is: 43,096.60
Step by Step Solution
- Step 1: Write the proportion equation
78,639.96 : 117,991.26 = 28,723.44 : x - Step 2: Convert to fraction form
78,639.96/117,991.26 = 28,723.44/x - Step 3: Cross multiply
78,639.96x = 117,991.26 × 28,723.44 - Step 4: Simplify right side
78,639.96x = 3,389,114,877.13 - Step 5: Solve for x
x = 3,389,114,877.13/78,639.96 - Step 6: Final answer
x = 43,096.60
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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.