Finding the Fourth Proportional to 100.08, 149.94 and 80.70
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Solution
The fourth proportional to 100.08, 149.94 and 80.70 is: 120.90
Step by Step Solution
- Step 1: Write the proportion equation
100.08 : 149.94 = 80.70 : x - Step 2: Convert to fraction form
100.08/149.94 = 80.70/x - Step 3: Cross multiply
100.08x = 149.94 × 80.70 - Step 4: Simplify right side
100.08x = 12,100.16 - Step 5: Solve for x
x = 12,100.16/100.08 - Step 6: Final answer
x = 120.90
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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.