Finding the Fourth Proportional to 209,136.12, 288,727.91 and 137,724.09
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Solution
The fourth proportional to 209,136.12, 288,727.91 and 137,724.09 is: 190,138.31
Step by Step Solution
- Step 1: Write the proportion equation
209,136.12 : 288,727.91 = 137,724.09 : x - Step 2: Convert to fraction form
209,136.12/288,727.91 = 137,724.09/x - Step 3: Cross multiply
209,136.12x = 288,727.91 × 137,724.09 - Step 4: Simplify right side
209,136.12x = 39,764,788,662.35 - Step 5: Solve for x
x = 39,764,788,662.35/209,136.12 - Step 6: Final answer
x = 190,138.31
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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.