Finding the Fourth Proportional to 71,644.70, 107,482.57 and 21,728.63
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Solution
The fourth proportional to 71,644.70, 107,482.57 and 21,728.63 is: 32,597.65
Step by Step Solution
- Step 1: Write the proportion equation
71,644.70 : 107,482.57 = 21,728.63 : x - Step 2: Convert to fraction form
71,644.70/107,482.57 = 21,728.63/x - Step 3: Cross multiply
71,644.70x = 107,482.57 × 21,728.63 - Step 4: Simplify right side
71,644.70x = 2,335,448,457.57 - Step 5: Solve for x
x = 2,335,448,457.57/71,644.70 - Step 6: Final answer
x = 32,597.65
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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.