Finding the Fourth Proportional to 78,218.94, 107,941.62 and 42,408.84
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Solution
The fourth proportional to 78,218.94, 107,941.62 and 42,408.84 is: 58,523.92
Step by Step Solution
- Step 1: Write the proportion equation
78,218.94 : 107,941.62 = 42,408.84 : x - Step 2: Convert to fraction form
78,218.94/107,941.62 = 42,408.84/x - Step 3: Cross multiply
78,218.94x = 107,941.62 × 42,408.84 - Step 4: Simplify right side
78,218.94x = 4,577,678,891.92 - Step 5: Solve for x
x = 4,577,678,891.92/78,218.94 - Step 6: Final answer
x = 58,523.92
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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.