Finding the Fourth Proportional to 80,578.10, 120,867.14 and 30,646.66
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Solution
The fourth proportional to 80,578.10, 120,867.14 and 30,646.66 is: 45,969.99
Step by Step Solution
- Step 1: Write the proportion equation
80,578.10 : 120,867.14 = 30,646.66 : x - Step 2: Convert to fraction form
80,578.10/120,867.14 = 30,646.66/x - Step 3: Cross multiply
80,578.10x = 120,867.14 × 30,646.66 - Step 4: Simplify right side
80,578.10x = 3,704,173,919.20 - Step 5: Solve for x
x = 3,704,173,919.20/80,578.10 - Step 6: Final answer
x = 45,969.99
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1.5x scale
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.