Finding the Fourth Proportional to 208,565.19, 312,728.94 and 82,136.97
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Solution
The fourth proportional to 208,565.19, 312,728.94 and 82,136.97 is: 123,158.65
Step by Step Solution
- Step 1: Write the proportion equation
208,565.19 : 312,728.94 = 82,136.97 : x - Step 2: Convert to fraction form
208,565.19/312,728.94 = 82,136.97/x - Step 3: Cross multiply
208,565.19x = 312,728.94 × 82,136.97 - Step 4: Simplify right side
208,565.19x = 25,686,607,562.91 - Step 5: Solve for x
x = 25,686,607,562.91/208,565.19 - Step 6: Final answer
x = 123,158.65
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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.