Finding the Fourth Proportional to 128,528.52, 177,344.15 and 80,754.19
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Solution
The fourth proportional to 128,528.52, 177,344.15 and 80,754.19 is: 111,424.94
Step by Step Solution
- Step 1: Write the proportion equation
128,528.52 : 177,344.15 = 80,754.19 : x - Step 2: Convert to fraction form
128,528.52/177,344.15 = 80,754.19/x - Step 3: Cross multiply
128,528.52x = 177,344.15 × 80,754.19 - Step 4: Simplify right side
128,528.52x = 14,321,282,741.13 - Step 5: Solve for x
x = 14,321,282,741.13/128,528.52 - Step 6: Final answer
x = 111,424.94
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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.