Finding the Fourth Proportional to 128,578.58, 192,898.44 and 53,657.09
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Solution
The fourth proportional to 128,578.58, 192,898.44 and 53,657.09 is: 80,498.39
Step by Step Solution
- Step 1: Write the proportion equation
128,578.58 : 192,898.44 = 53,657.09 : x - Step 2: Convert to fraction form
128,578.58/192,898.44 = 53,657.09/x - Step 3: Cross multiply
128,578.58x = 192,898.44 × 53,657.09 - Step 4: Simplify right side
128,578.58x = 10,350,368,955.94 - Step 5: Solve for x
x = 10,350,368,955.94/128,578.58 - Step 6: Final answer
x = 80,498.39
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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.