Finding the Fourth Proportional to 142,214.20, 196,255.11 and 81,781.99
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Solution
The fourth proportional to 142,214.20, 196,255.11 and 81,781.99 is: 112,858.87
Step by Step Solution
- Step 1: Write the proportion equation
142,214.20 : 196,255.11 = 81,781.99 : x - Step 2: Convert to fraction form
142,214.20/196,255.11 = 81,781.99/x - Step 3: Cross multiply
142,214.20x = 196,255.11 × 81,781.99 - Step 4: Simplify right side
142,214.20x = 16,050,133,443.47 - Step 5: Solve for x
x = 16,050,133,443.47/142,214.20 - Step 6: Final answer
x = 112,858.87
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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.