Finding the Fourth Proportional to 78,558.94, 117,838.66 and 19,394.62
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Solution
The fourth proportional to 78,558.94, 117,838.66 and 19,394.62 is: 29,091.99
Step by Step Solution
- Step 1: Write the proportion equation
78,558.94 : 117,838.66 = 19,394.62 : x - Step 2: Convert to fraction form
78,558.94/117,838.66 = 19,394.62/x - Step 3: Cross multiply
78,558.94x = 117,838.66 × 19,394.62 - Step 4: Simplify right side
78,558.94x = 2,285,435,891.69 - Step 5: Solve for x
x = 2,285,435,891.69/78,558.94 - Step 6: Final answer
x = 29,091.99
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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.