Finding the Fourth Proportional to 142,859.70, 197,138.61 and 79,206.66
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Solution
The fourth proportional to 142,859.70, 197,138.61 and 79,206.66 is: 109,300.88
Step by Step Solution
- Step 1: Write the proportion equation
142,859.70 : 197,138.61 = 79,206.66 : x - Step 2: Convert to fraction form
142,859.70/197,138.61 = 79,206.66/x - Step 3: Cross multiply
142,859.70x = 197,138.61 × 79,206.66 - Step 4: Simplify right side
142,859.70x = 15,614,690,855.14 - Step 5: Solve for x
x = 15,614,690,855.14/142,859.70 - Step 6: Final answer
x = 109,300.88
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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.