Finding the Fourth Proportional to 138,398,415.20, 207,455,905.20 and 80,861,069.60
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Solution
The fourth proportional to 138,398,415.20, 207,455,905.20 and 80,861,069.60 is: 121,208,804.05
Step by Step Solution
- Step 1: Write the proportion equation
138,398,415.20 : 207,455,905.20 = 80,861,069.60 : x - Step 2: Convert to fraction form
138,398,415.20/207,455,905.20 = 80,861,069.60/x - Step 3: Cross multiply
138,398,415.20x = 207,455,905.20 × 80,861,069.60 - Step 4: Simplify right side
138,398,415.20x = 16,775,106,389,308,200 - Step 5: Solve for x
x = 16,775,106,389,308,200/138,398,415.20 - Step 6: Final answer
x = 121,208,804.05
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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.