Finding the Fourth Proportional to 129,313,639.20, 193,970,458.80 and 115,283,596.80
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Solution
The fourth proportional to 129,313,639.20, 193,970,458.80 and 115,283,596.80 is: 172,925,395.20
Step by Step Solution
- Step 1: Write the proportion equation
129,313,639.20 : 193,970,458.80 = 115,283,596.80 : x - Step 2: Convert to fraction form
129,313,639.20/193,970,458.80 = 115,283,596.80/x - Step 3: Cross multiply
129,313,639.20x = 193,970,458.80 × 115,283,596.80 - Step 4: Simplify right side
129,313,639.20x = 22,361,612,163,410,212 - Step 5: Solve for x
x = 22,361,612,163,410,212/129,313,639.20 - Step 6: Final answer
x = 172,925,395.20
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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.