Finding the Fourth Proportional to 80.54, 120.73 and 40.02
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Solution
The fourth proportional to 80.54, 120.73 and 40.02 is: 59.99
Step by Step Solution
- Step 1: Write the proportion equation
80.54 : 120.73 = 40.02 : x - Step 2: Convert to fraction form
80.54/120.73 = 40.02/x - Step 3: Cross multiply
80.54x = 120.73 × 40.02 - Step 4: Simplify right side
80.54x = 4,831.61 - Step 5: Solve for x
x = 4,831.61/80.54 - Step 6: Final answer
x = 59.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.