Finding the Fourth Proportional to 89.10, 132.84 and 80.55
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Solution
The fourth proportional to 89.10, 132.84 and 80.55 is: 120.09
Step by Step Solution
- Step 1: Write the proportion equation
89.10 : 132.84 = 80.55 : x - Step 2: Convert to fraction form
89.10/132.84 = 80.55/x - Step 3: Cross multiply
89.10x = 132.84 × 80.55 - Step 4: Simplify right side
89.10x = 10,700.26 - Step 5: Solve for x
x = 10,700.26/89.10 - Step 6: Final answer
x = 120.09
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.