Finding the Fourth Proportional to 140.21, 193.48 and 84.99
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Solution
The fourth proportional to 140.21, 193.48 and 84.99 is: 117.28
Step by Step Solution
- Step 1: Write the proportion equation
140.21 : 193.48 = 84.99 : x - Step 2: Convert to fraction form
140.21/193.48 = 84.99/x - Step 3: Cross multiply
140.21x = 193.48 × 84.99 - Step 4: Simplify right side
140.21x = 16,443.87 - Step 5: Solve for x
x = 16,443.87/140.21 - Step 6: Final answer
x = 117.28
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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.