Finding the Fourth Proportional to 70,578.05, 105,880.84 and 20,658.96
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Solution
The fourth proportional to 70,578.05, 105,880.84 and 20,658.96 is: 30,992.47
Step by Step Solution
- Step 1: Write the proportion equation
70,578.05 : 105,880.84 = 20,658.96 : x - Step 2: Convert to fraction form
70,578.05/105,880.84 = 20,658.96/x - Step 3: Cross multiply
70,578.05x = 105,880.84 × 20,658.96 - Step 4: Simplify right side
70,578.05x = 2,187,387,986.68 - Step 5: Solve for x
x = 2,187,387,986.68/70,578.05 - Step 6: Final answer
x = 30,992.47
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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.