Finding the Fourth Proportional to 189,778.76, 261,894.70 and 103,738.08
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Solution
The fourth proportional to 189,778.76, 261,894.70 and 103,738.08 is: 143,158.56
Step by Step Solution
- Step 1: Write the proportion equation
189,778.76 : 261,894.70 = 103,738.08 : x - Step 2: Convert to fraction form
189,778.76/261,894.70 = 103,738.08/x - Step 3: Cross multiply
189,778.76x = 261,894.70 × 103,738.08 - Step 4: Simplify right side
189,778.76x = 27,168,452,821.49 - Step 5: Solve for x
x = 27,168,452,821.49/189,778.76 - Step 6: Final answer
x = 143,158.56
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.