Finding the Fourth Proportional to 85,491.16, 128,190.12 and 26,311.12
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Solution
The fourth proportional to 85,491.16, 128,190.12 and 26,311.12 is: 39,452.33
Step by Step Solution
- Step 1: Write the proportion equation
85,491.16 : 128,190.12 = 26,311.12 : x - Step 2: Convert to fraction form
85,491.16/128,190.12 = 26,311.12/x - Step 3: Cross multiply
85,491.16x = 128,190.12 × 26,311.12 - Step 4: Simplify right side
85,491.16x = 3,372,825,630.13 - Step 5: Solve for x
x = 3,372,825,630.13/85,491.16 - Step 6: Final answer
x = 39,452.33
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1.5x scale
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.