Finding the Fourth Proportional to 80,855.49, 121,279.12 and 30,931.75
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Solution
The fourth proportional to 80,855.49, 121,279.12 and 30,931.75 is: 46,396.05
Step by Step Solution
- Step 1: Write the proportion equation
80,855.49 : 121,279.12 = 30,931.75 : x - Step 2: Convert to fraction form
80,855.49/121,279.12 = 30,931.75/x - Step 3: Cross multiply
80,855.49x = 121,279.12 × 30,931.75 - Step 4: Simplify right side
80,855.49x = 3,751,375,420.06 - Step 5: Solve for x
x = 3,751,375,420.06/80,855.49 - Step 6: Final answer
x = 46,396.05
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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.