Finding the Fourth Proportional to 91.98, 137.91 and 40.62
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Solution
The fourth proportional to 91.98, 137.91 and 40.62 is: 60.90
Step by Step Solution
- Step 1: Write the proportion equation
91.98 : 137.91 = 40.62 : x - Step 2: Convert to fraction form
91.98/137.91 = 40.62/x - Step 3: Cross multiply
91.98x = 137.91 × 40.62 - Step 4: Simplify right side
91.98x = 5,601.90 - Step 5: Solve for x
x = 5,601.90/91.98 - Step 6: Final answer
x = 60.90
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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.