Finding the Fourth Proportional to 99.39, 149.16 and 76.62
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Solution
The fourth proportional to 99.39, 149.16 and 76.62 is: 114.99
Step by Step Solution
- Step 1: Write the proportion equation
99.39 : 149.16 = 76.62 : x - Step 2: Convert to fraction form
99.39/149.16 = 76.62/x - Step 3: Cross multiply
99.39x = 149.16 × 76.62 - Step 4: Simplify right side
99.39x = 11,428.64 - Step 5: Solve for x
x = 11,428.64/99.39 - Step 6: Final answer
x = 114.99
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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.