Finding the Fourth Proportional to 81,042.62, 121,618.23 and 28,452.26
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Solution
The fourth proportional to 81,042.62, 121,618.23 and 28,452.26 is: 42,697.45
Step by Step Solution
- Step 1: Write the proportion equation
81,042.62 : 121,618.23 = 28,452.26 : x - Step 2: Convert to fraction form
81,042.62/121,618.23 = 28,452.26/x - Step 3: Cross multiply
81,042.62x = 121,618.23 × 28,452.26 - Step 4: Simplify right side
81,042.62x = 3,460,313,500.70 - Step 5: Solve for x
x = 3,460,313,500.70/81,042.62 - Step 6: Final answer
x = 42,697.45
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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.