Finding the Fourth Proportional to 84.99, 128.03 and 63.75
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Solution
The fourth proportional to 84.99, 128.03 and 63.75 is: 96.04
Step by Step Solution
- Step 1: Write the proportion equation
84.99 : 128.03 = 63.75 : x - Step 2: Convert to fraction form
84.99/128.03 = 63.75/x - Step 3: Cross multiply
84.99x = 128.03 × 63.75 - Step 4: Simplify right side
84.99x = 8,162.07 - Step 5: Solve for x
x = 8,162.07/84.99 - Step 6: Final answer
x = 96.04
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.