Finding the Fourth Proportional to 129,542.10, 194,313.15 and 74,143.70
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Solution
The fourth proportional to 129,542.10, 194,313.15 and 74,143.70 is: 111,215.55
Step by Step Solution
- Step 1: Write the proportion equation
129,542.10 : 194,313.15 = 74,143.70 : x - Step 2: Convert to fraction form
129,542.10/194,313.15 = 74,143.70/x - Step 3: Cross multiply
129,542.10x = 194,313.15 × 74,143.70 - Step 4: Simplify right side
129,542.10x = 14,407,095,899.66 - Step 5: Solve for x
x = 14,407,095,899.66/129,542.10 - Step 6: Final answer
x = 111,215.55
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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.