Finding the Fourth Proportional to 81,288.80, 121,738.80 and 65,736.80
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Solution
The fourth proportional to 81,288.80, 121,738.80 and 65,736.80 is: 98,447.99
Step by Step Solution
- Step 1: Write the proportion equation
81,288.80 : 121,738.80 = 65,736.80 : x - Step 2: Convert to fraction form
81,288.80/121,738.80 = 65,736.80/x - Step 3: Cross multiply
81,288.80x = 121,738.80 × 65,736.80 - Step 4: Simplify right side
81,288.80x = 8,002,719,147.84 - Step 5: Solve for x
x = 8,002,719,147.84/81,288.80 - Step 6: Final answer
x = 98,447.99
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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.