Finding the Fourth Proportional to 80.79, 121.37 and 69.99
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Solution
The fourth proportional to 80.79, 121.37 and 69.99 is: 105.14
Step by Step Solution
- Step 1: Write the proportion equation
80.79 : 121.37 = 69.99 : x - Step 2: Convert to fraction form
80.79/121.37 = 69.99/x - Step 3: Cross multiply
80.79x = 121.37 × 69.99 - Step 4: Simplify right side
80.79x = 8,494.34 - Step 5: Solve for x
x = 8,494.34/80.79 - Step 6: Final answer
x = 105.14
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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.