Finding the Fourth Proportional to 84.99, 117.36 and 57.42
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Solution
The fourth proportional to 84.99, 117.36 and 57.42 is: 79.29
Step by Step Solution
- Step 1: Write the proportion equation
84.99 : 117.36 = 57.42 : x - Step 2: Convert to fraction form
84.99/117.36 = 57.42/x - Step 3: Cross multiply
84.99x = 117.36 × 57.42 - Step 4: Simplify right side
84.99x = 6,738.81 - Step 5: Solve for x
x = 6,738.81/84.99 - Step 6: Final answer
x = 79.29
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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.