Finding the Fourth Proportional to 137.99, 206.99 and 76.99
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Solution
The fourth proportional to 137.99, 206.99 and 76.99 is: 115.49
Step by Step Solution
- Step 1: Write the proportion equation
137.99 : 206.99 = 76.99 : x - Step 2: Convert to fraction form
137.99/206.99 = 76.99/x - Step 3: Cross multiply
137.99x = 206.99 × 76.99 - Step 4: Simplify right side
137.99x = 15,936.16 - Step 5: Solve for x
x = 15,936.16/137.99 - Step 6: Final answer
x = 115.49
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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.