Finding the Fourth Proportional to 87,519.10, 131,437.05 and 76,632.70
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Solution
The fourth proportional to 87,519.10, 131,437.05 and 76,632.70 is: 115,087.75
Step by Step Solution
- Step 1: Write the proportion equation
87,519.10 : 131,437.05 = 76,632.70 : x - Step 2: Convert to fraction form
87,519.10/131,437.05 = 76,632.70/x - Step 3: Cross multiply
87,519.10x = 131,437.05 × 76,632.70 - Step 4: Simplify right side
87,519.10x = 10,072,376,021.54 - Step 5: Solve for x
x = 10,072,376,021.54/87,519.10 - Step 6: Final answer
x = 115,087.75
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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.