Finding the Fourth Proportional to 198,153,566.40, 297,230,349.60 and 129,278,812.80
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Solution
The fourth proportional to 198,153,566.40, 297,230,349.60 and 129,278,812.80 is: 193,918,219.20
Step by Step Solution
- Step 1: Write the proportion equation
198,153,566.40 : 297,230,349.60 = 129,278,812.80 : x - Step 2: Convert to fraction form
198,153,566.40/297,230,349.60 = 129,278,812.80/x - Step 3: Cross multiply
198,153,566.40x = 297,230,349.60 × 129,278,812.80 - Step 4: Simplify right side
198,153,566.40x = 38,425,586,724,416,960 - Step 5: Solve for x
x = 38,425,586,724,416,960/198,153,566.40 - Step 6: Final answer
x = 193,918,219.20
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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.