Finding the Fourth Proportional to 142,213.20, 196,253.73 and 81,780.99
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Solution
The fourth proportional to 142,213.20, 196,253.73 and 81,780.99 is: 112,857.49
Step by Step Solution
- Step 1: Write the proportion equation
142,213.20 : 196,253.73 = 81,780.99 : x - Step 2: Convert to fraction form
142,213.20/196,253.73 = 81,780.99/x - Step 3: Cross multiply
142,213.20x = 196,253.73 × 81,780.99 - Step 4: Simplify right side
142,213.20x = 16,049,824,330.59 - Step 5: Solve for x
x = 16,049,824,330.59/142,213.20 - Step 6: Final answer
x = 112,857.49
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1.5x scale
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.