Finding the Fourth Proportional to 78,114.83, 107,717.84 and 66,821.71
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Solution
The fourth proportional to 78,114.83, 107,717.84 and 66,821.71 is: 92,144.99
Step by Step Solution
- Step 1: Write the proportion equation
78,114.83 : 107,717.84 = 66,821.71 : x - Step 2: Convert to fraction form
78,114.83/107,717.84 = 66,821.71/x - Step 3: Cross multiply
78,114.83x = 107,717.84 × 66,821.71 - Step 4: Simplify right side
78,114.83x = 7,197,890,164.07 - Step 5: Solve for x
x = 7,197,890,164.07/78,114.83 - Step 6: Final answer
x = 92,144.99
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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.