Finding the Fourth Proportional to 90,690.75, 136,039.17 and 40,770.99
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Solution
The fourth proportional to 90,690.75, 136,039.17 and 40,770.99 is: 61,157.85
Step by Step Solution
- Step 1: Write the proportion equation
90,690.75 : 136,039.17 = 40,770.99 : x - Step 2: Convert to fraction form
90,690.75/136,039.17 = 40,770.99/x - Step 3: Cross multiply
90,690.75x = 136,039.17 × 40,770.99 - Step 4: Simplify right side
90,690.75x = 5,546,451,639.68 - Step 5: Solve for x
x = 5,546,451,639.68/90,690.75 - Step 6: Final answer
x = 61,157.85
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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.