Finding the Fourth Proportional to 137.41, 189.67 and 84.99
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Solution
The fourth proportional to 137.41, 189.67 and 84.99 is: 117.32
Step by Step Solution
- Step 1: Write the proportion equation
137.41 : 189.67 = 84.99 : x - Step 2: Convert to fraction form
137.41/189.67 = 84.99/x - Step 3: Cross multiply
137.41x = 189.67 × 84.99 - Step 4: Simplify right side
137.41x = 16,121.03 - Step 5: Solve for x
x = 16,121.03/137.41 - Step 6: Final answer
x = 117.32
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.