Finding the Fourth Proportional to 105,436.35, 157,979.57 and 74,205.99
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Solution
The fourth proportional to 105,436.35, 157,979.57 and 74,205.99 is: 111,185.85
Step by Step Solution
- Step 1: Write the proportion equation
105,436.35 : 157,979.57 = 74,205.99 : x - Step 2: Convert to fraction form
105,436.35/157,979.57 = 74,205.99/x - Step 3: Cross multiply
105,436.35x = 157,979.57 × 74,205.99 - Step 4: Simplify right side
105,436.35x = 11,723,030,020.59 - Step 5: Solve for x
x = 11,723,030,020.59/105,436.35 - Step 6: Final answer
x = 111,185.85
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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.