Finding the Fourth Proportional to 87,115.80, 121,806.60 and 87,115.80
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Solution
The fourth proportional to 87,115.80, 121,806.60 and 87,115.80 is: 121,806.60
Step by Step Solution
- Step 1: Write the proportion equation
87,115.80 : 121,806.60 = 87,115.80 : x - Step 2: Convert to fraction form
87,115.80/121,806.60 = 87,115.80/x - Step 3: Cross multiply
87,115.80x = 121,806.60 × 87,115.80 - Step 4: Simplify right side
87,115.80x = 10,611,279,404.28 - Step 5: Solve for x
x = 10,611,279,404.28/87,115.80 - Step 6: Final answer
x = 121,806.60
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Why These Related Problems?
These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.