Finding the Fourth Proportional to 91.65, 137.49 and 45.99
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Solution
The fourth proportional to 91.65, 137.49 and 45.99 is: 68.99
Step by Step Solution
- Step 1: Write the proportion equation
91.65 : 137.49 = 45.99 : x - Step 2: Convert to fraction form
91.65/137.49 = 45.99/x - Step 3: Cross multiply
91.65x = 137.49 × 45.99 - Step 4: Simplify right side
91.65x = 6,323.17 - Step 5: Solve for x
x = 6,323.17/91.65 - Step 6: Final answer
x = 68.99
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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.