Finding the Fourth Proportional to 84.68, 126.99 and 30.56
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Solution
The fourth proportional to 84.68, 126.99 and 30.56 is: 45.83
Step by Step Solution
- Step 1: Write the proportion equation
84.68 : 126.99 = 30.56 : x - Step 2: Convert to fraction form
84.68/126.99 = 30.56/x - Step 3: Cross multiply
84.68x = 126.99 × 30.56 - Step 4: Simplify right side
84.68x = 3,881.13 - Step 5: Solve for x
x = 3,881.13/84.68 - Step 6: Final answer
x = 45.83
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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.