Finding the Fourth Proportional to 80,838.20, 121,257.30 and 68,007.80
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Solution
The fourth proportional to 80,838.20, 121,257.30 and 68,007.80 is: 102,011.70
Step by Step Solution
- Step 1: Write the proportion equation
80,838.20 : 121,257.30 = 68,007.80 : x - Step 2: Convert to fraction form
80,838.20/121,257.30 = 68,007.80/x - Step 3: Cross multiply
80,838.20x = 121,257.30 × 68,007.80 - Step 4: Simplify right side
80,838.20x = 8,246,442,206.94 - Step 5: Solve for x
x = 8,246,442,206.94/80,838.20 - Step 6: Final answer
x = 102,011.70
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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.