Finding the Fourth Proportional to 80.57, 120.94 and 42.08
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Solution
The fourth proportional to 80.57, 120.94 and 42.08 is: 63.17
Step by Step Solution
- Step 1: Write the proportion equation
80.57 : 120.94 = 42.08 : x - Step 2: Convert to fraction form
80.57/120.94 = 42.08/x - Step 3: Cross multiply
80.57x = 120.94 × 42.08 - Step 4: Simplify right side
80.57x = 5,089.34 - Step 5: Solve for x
x = 5,089.34/80.57 - Step 6: Final answer
x = 63.17
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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.