Finding the Fourth Proportional to 138,397,197.90, 190,984,770.99 and 76,515,945.42
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Solution
The fourth proportional to 138,397,197.90, 190,984,770.99 and 76,515,945.42 is: 105,590,145.86
Step by Step Solution
- Step 1: Write the proportion equation
138,397,197.90 : 190,984,770.99 = 76,515,945.42 : x - Step 2: Convert to fraction form
138,397,197.90/190,984,770.99 = 76,515,945.42/x - Step 3: Cross multiply
138,397,197.90x = 190,984,770.99 × 76,515,945.42 - Step 4: Simplify right side
138,397,197.90x = 14,613,380,313,122,040 - Step 5: Solve for x
x = 14,613,380,313,122,040/138,397,197.90 - Step 6: Final answer
x = 105,590,145.86
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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.