Finding the Fourth Proportional to 128,657.94, 177,453.09 and 88,378.26
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Solution
The fourth proportional to 128,657.94, 177,453.09 and 88,378.26 is: 121,896.83
Step by Step Solution
- Step 1: Write the proportion equation
128,657.94 : 177,453.09 = 88,378.26 : x - Step 2: Convert to fraction form
128,657.94/177,453.09 = 88,378.26/x - Step 3: Cross multiply
128,657.94x = 177,453.09 × 88,378.26 - Step 4: Simplify right side
128,657.94x = 15,682,995,325.82 - Step 5: Solve for x
x = 15,682,995,325.82/128,657.94 - Step 6: Final answer
x = 121,896.83
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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.