Finding the Fourth Proportional to 85,538.21, 128,299.07 and 26,357.99
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Solution
The fourth proportional to 85,538.21, 128,299.07 and 26,357.99 is: 39,534.44
Step by Step Solution
- Step 1: Write the proportion equation
85,538.21 : 128,299.07 = 26,357.99 : x - Step 2: Convert to fraction form
85,538.21/128,299.07 = 26,357.99/x - Step 3: Cross multiply
85,538.21x = 128,299.07 × 26,357.99 - Step 4: Simplify right side
85,538.21x = 3,381,705,151.53 - Step 5: Solve for x
x = 3,381,705,151.53/85,538.21 - Step 6: Final answer
x = 39,534.44
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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.