Finding the Fourth Proportional to 80.84, 120.52 and 74.82
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Solution
The fourth proportional to 80.84, 120.52 and 74.82 is: 111.55
Step by Step Solution
- Step 1: Write the proportion equation
80.84 : 120.52 = 74.82 : x - Step 2: Convert to fraction form
80.84/120.52 = 74.82/x - Step 3: Cross multiply
80.84x = 120.52 × 74.82 - Step 4: Simplify right side
80.84x = 9,017.31 - Step 5: Solve for x
x = 9,017.31/80.84 - Step 6: Final answer
x = 111.55
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.