Finding the Fourth Proportional to 87,419.24, 120,634.78 and 49,178.13
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Solution
The fourth proportional to 87,419.24, 120,634.78 and 49,178.13 is: 67,863.70
Step by Step Solution
- Step 1: Write the proportion equation
87,419.24 : 120,634.78 = 49,178.13 : x - Step 2: Convert to fraction form
87,419.24/120,634.78 = 49,178.13/x - Step 3: Cross multiply
87,419.24x = 120,634.78 × 49,178.13 - Step 4: Simplify right side
87,419.24x = 5,932,592,893.36 - Step 5: Solve for x
x = 5,932,592,893.36/87,419.24 - Step 6: Final answer
x = 67,863.70
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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.