Finding the Fourth Proportional to 138,149.28, 207,455.04 and 120,769.92
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Solution
The fourth proportional to 138,149.28, 207,455.04 and 120,769.92 is: 181,356.92
Step by Step Solution
- Step 1: Write the proportion equation
138,149.28 : 207,455.04 = 120,769.92 : x - Step 2: Convert to fraction form
138,149.28/207,455.04 = 120,769.92/x - Step 3: Cross multiply
138,149.28x = 207,455.04 × 120,769.92 - Step 4: Simplify right side
138,149.28x = 25,054,328,584.40 - Step 5: Solve for x
x = 25,054,328,584.40/138,149.28 - Step 6: Final answer
x = 181,356.92
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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.