Finding the Fourth Proportional to 120.91, 181.38 and 59.99
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Solution
The fourth proportional to 120.91, 181.38 and 59.99 is: 89.98
Step by Step Solution
- Step 1: Write the proportion equation
120.91 : 181.38 = 59.99 : x - Step 2: Convert to fraction form
120.91/181.38 = 59.99/x - Step 3: Cross multiply
120.91x = 181.38 × 59.99 - Step 4: Simplify right side
120.91x = 10,879.78 - Step 5: Solve for x
x = 10,879.78/120.91 - Step 6: Final answer
x = 89.98
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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.