Finding the Fourth Proportional to 79,943.78, 119,916.04 and 20,775.26
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Solution
The fourth proportional to 79,943.78, 119,916.04 and 20,775.26 is: 31,162.99
Step by Step Solution
- Step 1: Write the proportion equation
79,943.78 : 119,916.04 = 20,775.26 : x - Step 2: Convert to fraction form
79,943.78/119,916.04 = 20,775.26/x - Step 3: Cross multiply
79,943.78x = 119,916.04 × 20,775.26 - Step 4: Simplify right side
79,943.78x = 2,491,286,909.17 - Step 5: Solve for x
x = 2,491,286,909.17/79,943.78 - Step 6: Final answer
x = 31,162.99
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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.