Finding the Fourth Proportional to 80,879.80, 121,319.70 and 28,283.80
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Solution
The fourth proportional to 80,879.80, 121,319.70 and 28,283.80 is: 42,425.70
Step by Step Solution
- Step 1: Write the proportion equation
80,879.80 : 121,319.70 = 28,283.80 : x - Step 2: Convert to fraction form
80,879.80/121,319.70 = 28,283.80/x - Step 3: Cross multiply
80,879.80x = 121,319.70 × 28,283.80 - Step 4: Simplify right side
80,879.80x = 3,431,382,130.86 - Step 5: Solve for x
x = 3,431,382,130.86/80,879.80 - Step 6: Final answer
x = 42,425.70
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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.