Finding the Fourth Proportional to 142.12, 194.84 and 139.99
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Solution
The fourth proportional to 142.12, 194.84 and 139.99 is: 191.92
Step by Step Solution
- Step 1: Write the proportion equation
142.12 : 194.84 = 139.99 : x - Step 2: Convert to fraction form
142.12/194.84 = 139.99/x - Step 3: Cross multiply
142.12x = 194.84 × 139.99 - Step 4: Simplify right side
142.12x = 27,275.65 - Step 5: Solve for x
x = 27,275.65/142.12 - Step 6: Final answer
x = 191.92
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.