Finding the Fourth Proportional to 100,874.69, 139,175.67 and 57,259.99
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Solution
The fourth proportional to 100,874.69, 139,175.67 and 57,259.99 is: 79,000.96
Step by Step Solution
- Step 1: Write the proportion equation
100,874.69 : 139,175.67 = 57,259.99 : x - Step 2: Convert to fraction form
100,874.69/139,175.67 = 57,259.99/x - Step 3: Cross multiply
100,874.69x = 139,175.67 × 57,259.99 - Step 4: Simplify right side
100,874.69x = 7,969,197,147.62 - Step 5: Solve for x
x = 7,969,197,147.62/100,874.69 - Step 6: Final answer
x = 79,000.96
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.