Finding the Fourth Proportional to 85,579.96, 128,400.36 and 38,190.75
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Solution
The fourth proportional to 85,579.96, 128,400.36 and 38,190.75 is: 57,299.70
Step by Step Solution
- Step 1: Write the proportion equation
85,579.96 : 128,400.36 = 38,190.75 : x - Step 2: Convert to fraction form
85,579.96/128,400.36 = 38,190.75/x - Step 3: Cross multiply
85,579.96x = 128,400.36 × 38,190.75 - Step 4: Simplify right side
85,579.96x = 4,903,706,048.67 - Step 5: Solve for x
x = 4,903,706,048.67/85,579.96 - Step 6: Final answer
x = 57,299.70
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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.