Finding the Fourth Proportional to 118.21, 163.00 and 87.07
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Solution
The fourth proportional to 118.21, 163.00 and 87.07 is: 120.06
Step by Step Solution
- Step 1: Write the proportion equation
118.21 : 163.00 = 87.07 : x - Step 2: Convert to fraction form
118.21/163.00 = 87.07/x - Step 3: Cross multiply
118.21x = 163.00 × 87.07 - Step 4: Simplify right side
118.21x = 14,193.08 - Step 5: Solve for x
x = 14,193.08/118.21 - Step 6: Final answer
x = 120.06
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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.