Finding the Fourth Proportional to 76,723.20, 115,257.60 and 74,649.60
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Solution
The fourth proportional to 76,723.20, 115,257.60 and 74,649.60 is: 112,142.53
Step by Step Solution
- Step 1: Write the proportion equation
76,723.20 : 115,257.60 = 74,649.60 : x - Step 2: Convert to fraction form
76,723.20/115,257.60 = 74,649.60/x - Step 3: Cross multiply
76,723.20x = 115,257.60 × 74,649.60 - Step 4: Simplify right side
76,723.20x = 8,603,933,736.96 - Step 5: Solve for x
x = 8,603,933,736.96/76,723.20 - Step 6: Final answer
x = 112,142.53
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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.