Finding the Fourth Proportional to 87,120.97, 120,266.78 and 66,970.80
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Solution
The fourth proportional to 87,120.97, 120,266.78 and 66,970.80 is: 92,450.33
Step by Step Solution
- Step 1: Write the proportion equation
87,120.97 : 120,266.78 = 66,970.80 : x - Step 2: Convert to fraction form
87,120.97/120,266.78 = 66,970.80/x - Step 3: Cross multiply
87,120.97x = 120,266.78 × 66,970.80 - Step 4: Simplify right side
87,120.97x = 8,054,362,135.17 - Step 5: Solve for x
x = 8,054,362,135.17/87,120.97 - Step 6: Final answer
x = 92,450.33
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.