Finding the Fourth Proportional to 138,136.66, 190,626.69 and 77,707.29
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Solution
The fourth proportional to 138,136.66, 190,626.69 and 77,707.29 is: 107,234.99
Step by Step Solution
- Step 1: Write the proportion equation
138,136.66 : 190,626.69 = 77,707.29 : x - Step 2: Convert to fraction form
138,136.66/190,626.69 = 77,707.29/x - Step 3: Cross multiply
138,136.66x = 190,626.69 × 77,707.29 - Step 4: Simplify right side
138,136.66x = 14,813,083,481.57 - Step 5: Solve for x
x = 14,813,083,481.57/138,136.66 - Step 6: Final answer
x = 107,234.99
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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.