Finding the Fourth Proportional to 90,720,121.20, 136,080,181.80 and 30,135,847.20
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Solution
The fourth proportional to 90,720,121.20, 136,080,181.80 and 30,135,847.20 is: 45,203,770.80
Step by Step Solution
- Step 1: Write the proportion equation
90,720,121.20 : 136,080,181.80 = 30,135,847.20 : x - Step 2: Convert to fraction form
90,720,121.20/136,080,181.80 = 30,135,847.20/x - Step 3: Cross multiply
90,720,121.20x = 136,080,181.80 × 30,135,847.20 - Step 4: Simplify right side
90,720,121.20x = 4,100,891,565,673,021 - Step 5: Solve for x
x = 4,100,891,565,673,021/90,720,121.20 - Step 6: Final answer
x = 45,203,770.80
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1.5x scale
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.