Finding the Fourth Proportional to 79,439.75, 109,578.71 and 47,153.09
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Solution
The fourth proportional to 79,439.75, 109,578.71 and 47,153.09 is: 65,042.68
Step by Step Solution
- Step 1: Write the proportion equation
79,439.75 : 109,578.71 = 47,153.09 : x - Step 2: Convert to fraction form
79,439.75/109,578.71 = 47,153.09/x - Step 3: Cross multiply
79,439.75x = 109,578.71 × 47,153.09 - Step 4: Simplify right side
79,439.75x = 5,166,973,991.05 - Step 5: Solve for x
x = 5,166,973,991.05/79,439.75 - Step 6: Final answer
x = 65,042.68
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.