Finding the Fourth Proportional to 78,343.97, 117,435.50 and 30,939.84
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Solution
The fourth proportional to 78,343.97, 117,435.50 and 30,939.84 is: 46,377.99
Step by Step Solution
- Step 1: Write the proportion equation
78,343.97 : 117,435.50 = 30,939.84 : x - Step 2: Convert to fraction form
78,343.97/117,435.50 = 30,939.84/x - Step 3: Cross multiply
78,343.97x = 117,435.50 × 30,939.84 - Step 4: Simplify right side
78,343.97x = 3,633,435,580.32 - Step 5: Solve for x
x = 3,633,435,580.32/78,343.97 - Step 6: Final answer
x = 46,377.99
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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.