Finding the Fourth Proportional to 128,361.42, 192,542.67 and 84,267.18
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Solution
The fourth proportional to 128,361.42, 192,542.67 and 84,267.18 is: 126,401.12
Step by Step Solution
- Step 1: Write the proportion equation
128,361.42 : 192,542.67 = 84,267.18 : x - Step 2: Convert to fraction form
128,361.42/192,542.67 = 84,267.18/x - Step 3: Cross multiply
128,361.42x = 192,542.67 × 84,267.18 - Step 4: Simplify right side
128,361.42x = 16,225,027,830.57 - Step 5: Solve for x
x = 16,225,027,830.57/128,361.42 - Step 6: Final answer
x = 126,401.12
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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.