Finding the Fourth Proportional to 128,690.39, 192,969.77 and 53,790.09
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Solution
The fourth proportional to 128,690.39, 192,969.77 and 53,790.09 is: 80,657.63
Step by Step Solution
- Step 1: Write the proportion equation
128,690.39 : 192,969.77 = 53,790.09 : x - Step 2: Convert to fraction form
128,690.39/192,969.77 = 53,790.09/x - Step 3: Cross multiply
128,690.39x = 192,969.77 × 53,790.09 - Step 4: Simplify right side
128,690.39x = 10,379,861,026.63 - Step 5: Solve for x
x = 10,379,861,026.63/128,690.39 - Step 6: Final answer
x = 80,657.63
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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.