Finding the Fourth Proportional to 91.87, 137.88 and 73.95
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Solution
The fourth proportional to 91.87, 137.88 and 73.95 is: 110.99
Step by Step Solution
- Step 1: Write the proportion equation
91.87 : 137.88 = 73.95 : x - Step 2: Convert to fraction form
91.87/137.88 = 73.95/x - Step 3: Cross multiply
91.87x = 137.88 × 73.95 - Step 4: Simplify right side
91.87x = 10,196.23 - Step 5: Solve for x
x = 10,196.23/91.87 - Step 6: Final answer
x = 110.99
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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.