Finding the Fourth Proportional to 91.20, 136.84 and 37.09
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Solution
The fourth proportional to 91.20, 136.84 and 37.09 is: 55.65
Step by Step Solution
- Step 1: Write the proportion equation
91.20 : 136.84 = 37.09 : x - Step 2: Convert to fraction form
91.20/136.84 = 37.09/x - Step 3: Cross multiply
91.20x = 136.84 × 37.09 - Step 4: Simplify right side
91.20x = 5,075.40 - Step 5: Solve for x
x = 5,075.40/91.20 - Step 6: Final answer
x = 55.65
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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.