Finding the Fourth Proportional to 208,079.20, 312,118.80 and 74,963.80
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Solution
The fourth proportional to 208,079.20, 312,118.80 and 74,963.80 is: 112,445.70
Step by Step Solution
- Step 1: Write the proportion equation
208,079.20 : 312,118.80 = 74,963.80 : x - Step 2: Convert to fraction form
208,079.20/312,118.80 = 74,963.80/x - Step 3: Cross multiply
208,079.20x = 312,118.80 × 74,963.80 - Step 4: Simplify right side
208,079.20x = 23,397,611,299.44 - Step 5: Solve for x
x = 23,397,611,299.44/208,079.20 - Step 6: Final answer
x = 112,445.70
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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.