Finding the Fourth Proportional to 87,415.20, 131,122.80 and 28,293.30
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Solution
The fourth proportional to 87,415.20, 131,122.80 and 28,293.30 is: 42,439.95
Step by Step Solution
- Step 1: Write the proportion equation
87,415.20 : 131,122.80 = 28,293.30 : x - Step 2: Convert to fraction form
87,415.20/131,122.80 = 28,293.30/x - Step 3: Cross multiply
87,415.20x = 131,122.80 × 28,293.30 - Step 4: Simplify right side
87,415.20x = 3,709,896,717.24 - Step 5: Solve for x
x = 3,709,896,717.24/87,415.20 - Step 6: Final answer
x = 42,439.95
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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.