Finding the Fourth Proportional to 129,091.68, 178,163.25 and 72,503.07
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Solution
The fourth proportional to 129,091.68, 178,163.25 and 72,503.07 is: 100,063.63
Step by Step Solution
- Step 1: Write the proportion equation
129,091.68 : 178,163.25 = 72,503.07 : x - Step 2: Convert to fraction form
129,091.68/178,163.25 = 72,503.07/x - Step 3: Cross multiply
129,091.68x = 178,163.25 × 72,503.07 - Step 4: Simplify right side
129,091.68x = 12,917,382,586.18 - Step 5: Solve for x
x = 12,917,382,586.18/129,091.68 - Step 6: Final answer
x = 100,063.63
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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.