Finding the Fourth Proportional to 133.11, 183.63 and 91.70
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Solution
The fourth proportional to 133.11, 183.63 and 91.70 is: 126.50
Step by Step Solution
- Step 1: Write the proportion equation
133.11 : 183.63 = 91.70 : x - Step 2: Convert to fraction form
133.11/183.63 = 91.70/x - Step 3: Cross multiply
133.11x = 183.63 × 91.70 - Step 4: Simplify right side
133.11x = 16,838.99 - Step 5: Solve for x
x = 16,838.99/133.11 - Step 6: Final answer
x = 126.50
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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.