Finding the Fourth Proportional to 87.20, 120.36 and 58.08
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Solution
The fourth proportional to 87.20, 120.36 and 58.08 is: 80.17
Step by Step Solution
- Step 1: Write the proportion equation
87.20 : 120.36 = 58.08 : x - Step 2: Convert to fraction form
87.20/120.36 = 58.08/x - Step 3: Cross multiply
87.20x = 120.36 × 58.08 - Step 4: Simplify right side
87.20x = 6,990.51 - Step 5: Solve for x
x = 6,990.51/87.20 - Step 6: Final answer
x = 80.17
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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.