Finding the Fourth Proportional to 199.88, 299.93 and 91.70
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Solution
The fourth proportional to 199.88, 299.93 and 91.70 is: 137.59
Step by Step Solution
- Step 1: Write the proportion equation
199.88 : 299.93 = 91.70 : x - Step 2: Convert to fraction form
199.88/299.93 = 91.70/x - Step 3: Cross multiply
199.88x = 299.93 × 91.70 - Step 4: Simplify right side
199.88x = 27,501.62 - Step 5: Solve for x
x = 27,501.62/199.88 - Step 6: Final answer
x = 137.59
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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.