Finding the Fourth Proportional to 257,631.36, 386,512.44 and 80,139.70
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Solution
The fourth proportional to 257,631.36, 386,512.44 and 80,139.70 is: 120,229.89
Step by Step Solution
- Step 1: Write the proportion equation
257,631.36 : 386,512.44 = 80,139.70 : x - Step 2: Convert to fraction form
257,631.36/386,512.44 = 80,139.70/x - Step 3: Cross multiply
257,631.36x = 386,512.44 × 80,139.70 - Step 4: Simplify right side
257,631.36x = 30,974,990,987.87 - Step 5: Solve for x
x = 30,974,990,987.87/257,631.36 - Step 6: Final answer
x = 120,229.89
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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.