Finding the Fourth Proportional to 71,121.28, 106,688.04 and 18,530.80
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Solution
The fourth proportional to 71,121.28, 106,688.04 and 18,530.80 is: 27,797.79
Step by Step Solution
- Step 1: Write the proportion equation
71,121.28 : 106,688.04 = 18,530.80 : x - Step 2: Convert to fraction form
71,121.28/106,688.04 = 18,530.80/x - Step 3: Cross multiply
71,121.28x = 106,688.04 × 18,530.80 - Step 4: Simplify right side
71,121.28x = 1,977,014,731.63 - Step 5: Solve for x
x = 1,977,014,731.63/71,121.28 - Step 6: Final answer
x = 27,797.79
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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.