Finding the Fourth Proportional to 80.69, 121.48 and 67.10
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Solution
The fourth proportional to 80.69, 121.48 and 67.10 is: 101.02
Step by Step Solution
- Step 1: Write the proportion equation
80.69 : 121.48 = 67.10 : x - Step 2: Convert to fraction form
80.69/121.48 = 67.10/x - Step 3: Cross multiply
80.69x = 121.48 × 67.10 - Step 4: Simplify right side
80.69x = 8,151.31 - Step 5: Solve for x
x = 8,151.31/80.69 - Step 6: Final answer
x = 101.02
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.