Finding the Fourth Proportional to 135,861,917.40, 203,494,277.70 and 81,915,139.80
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Solution
The fourth proportional to 135,861,917.40, 203,494,277.70 and 81,915,139.80 is: 122,692,675.96
Step by Step Solution
- Step 1: Write the proportion equation
135,861,917.40 : 203,494,277.70 = 81,915,139.80 : x - Step 2: Convert to fraction form
135,861,917.40/203,494,277.70 = 81,915,139.80/x - Step 3: Cross multiply
135,861,917.40x = 203,494,277.70 × 81,915,139.80 - Step 4: Simplify right side
135,861,917.40x = 16,669,262,206,295,520 - Step 5: Solve for x
x = 16,669,262,206,295,520/135,861,917.40 - Step 6: Final answer
x = 122,692,675.96
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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.