Finding the Fourth Proportional to 84.36, 125.99 and 79.68
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Solution
The fourth proportional to 84.36, 125.99 and 79.68 is: 119.00
Step by Step Solution
- Step 1: Write the proportion equation
84.36 : 125.99 = 79.68 : x - Step 2: Convert to fraction form
84.36/125.99 = 79.68/x - Step 3: Cross multiply
84.36x = 125.99 × 79.68 - Step 4: Simplify right side
84.36x = 10,039.08 - Step 5: Solve for x
x = 10,039.08/84.36 - Step 6: Final answer
x = 119.00
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.