Finding the Fourth Proportional to 81,336.44, 121,917.12 and 53,167.88
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Solution
The fourth proportional to 81,336.44, 121,917.12 and 53,167.88 is: 79,694.60
Step by Step Solution
- Step 1: Write the proportion equation
81,336.44 : 121,917.12 = 53,167.88 : x - Step 2: Convert to fraction form
81,336.44/121,917.12 = 53,167.88/x - Step 3: Cross multiply
81,336.44x = 121,917.12 × 53,167.88 - Step 4: Simplify right side
81,336.44x = 6,482,074,806.11 - Step 5: Solve for x
x = 6,482,074,806.11/81,336.44 - Step 6: Final answer
x = 79,694.60
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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.