Finding the Fourth Proportional to 80.96, 121.08 and 69.08
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Solution
The fourth proportional to 80.96, 121.08 and 69.08 is: 103.31
Step by Step Solution
- Step 1: Write the proportion equation
80.96 : 121.08 = 69.08 : x - Step 2: Convert to fraction form
80.96/121.08 = 69.08/x - Step 3: Cross multiply
80.96x = 121.08 × 69.08 - Step 4: Simplify right side
80.96x = 8,364.21 - Step 5: Solve for x
x = 8,364.21/80.96 - Step 6: Final answer
x = 103.31
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.