Finding the Fourth Proportional to 128,457.29, 192,464.45 and 85,153.68
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Solution
The fourth proportional to 128,457.29, 192,464.45 and 85,153.68 is: 127,583.70
Step by Step Solution
- Step 1: Write the proportion equation
128,457.29 : 192,464.45 = 85,153.68 : x - Step 2: Convert to fraction form
128,457.29/192,464.45 = 85,153.68/x - Step 3: Cross multiply
128,457.29x = 192,464.45 × 85,153.68 - Step 4: Simplify right side
128,457.29x = 16,389,056,559.22 - Step 5: Solve for x
x = 16,389,056,559.22/128,457.29 - Step 6: Final answer
x = 127,583.70
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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.