Finding the Fourth Proportional to 68,515.20, 102,772.80 and 19,260.80
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Solution
The fourth proportional to 68,515.20, 102,772.80 and 19,260.80 is: 28,891.20
Step by Step Solution
- Step 1: Write the proportion equation
68,515.20 : 102,772.80 = 19,260.80 : x - Step 2: Convert to fraction form
68,515.20/102,772.80 = 19,260.80/x - Step 3: Cross multiply
68,515.20x = 102,772.80 × 19,260.80 - Step 4: Simplify right side
68,515.20x = 1,979,486,346.24 - Step 5: Solve for x
x = 1,979,486,346.24/68,515.20 - Step 6: Final answer
x = 28,891.20
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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.