Finding the Fourth Proportional to 74,861.60, 103,284.21 and 49,380.62
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Solution
The fourth proportional to 74,861.60, 103,284.21 and 49,380.62 is: 68,128.90
Step by Step Solution
- Step 1: Write the proportion equation
74,861.60 : 103,284.21 = 49,380.62 : x - Step 2: Convert to fraction form
74,861.60/103,284.21 = 49,380.62/x - Step 3: Cross multiply
74,861.60x = 103,284.21 × 49,380.62 - Step 4: Simplify right side
74,861.60x = 5,100,237,809.59 - Step 5: Solve for x
x = 5,100,237,809.59/74,861.60 - Step 6: Final answer
x = 68,128.90
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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.