Finding the Fourth Proportional to 100,836.63, 139,157.87 and 55,517.94
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Solution
The fourth proportional to 100,836.63, 139,157.87 and 55,517.94 is: 76,616.58
Step by Step Solution
- Step 1: Write the proportion equation
100,836.63 : 139,157.87 = 55,517.94 : x - Step 2: Convert to fraction form
100,836.63/139,157.87 = 55,517.94/x - Step 3: Cross multiply
100,836.63x = 139,157.87 × 55,517.94 - Step 4: Simplify right side
100,836.63x = 7,725,757,999.60 - Step 5: Solve for x
x = 7,725,757,999.60/100,836.63 - Step 6: Final answer
x = 76,616.58
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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.