Finding the Fourth Proportional to 128,781.09, 193,169.58 and 35,286.84
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Solution
The fourth proportional to 128,781.09, 193,169.58 and 35,286.84 is: 52,929.69
Step by Step Solution
- Step 1: Write the proportion equation
128,781.09 : 193,169.58 = 35,286.84 : x - Step 2: Convert to fraction form
128,781.09/193,169.58 = 35,286.84/x - Step 3: Cross multiply
128,781.09x = 193,169.58 × 35,286.84 - Step 4: Simplify right side
128,781.09x = 6,816,342,920.05 - Step 5: Solve for x
x = 6,816,342,920.05/128,781.09 - Step 6: Final answer
x = 52,929.69
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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.