Finding the Fourth Proportional to 78,932.87, 118,316.60 and 36,778.19
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Solution
The fourth proportional to 78,932.87, 118,316.60 and 36,778.19 is: 55,128.75
Step by Step Solution
- Step 1: Write the proportion equation
78,932.87 : 118,316.60 = 36,778.19 : x - Step 2: Convert to fraction form
78,932.87/118,316.60 = 36,778.19/x - Step 3: Cross multiply
78,932.87x = 118,316.60 × 36,778.19 - Step 4: Simplify right side
78,932.87x = 4,351,470,629.81 - Step 5: Solve for x
x = 4,351,470,629.81/78,932.87 - Step 6: Final answer
x = 55,128.75
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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.