Finding the Fourth Proportional to 143.24, 197.61 and 84.99
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Solution
The fourth proportional to 143.24, 197.61 and 84.99 is: 117.25
Step by Step Solution
- Step 1: Write the proportion equation
143.24 : 197.61 = 84.99 : x - Step 2: Convert to fraction form
143.24/197.61 = 84.99/x - Step 3: Cross multiply
143.24x = 197.61 × 84.99 - Step 4: Simplify right side
143.24x = 16,794.87 - Step 5: Solve for x
x = 16,794.87/143.24 - Step 6: Final answer
x = 117.25
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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.