Finding the Fourth Proportional to 138,340.80, 207,511.20 and 122,011.20
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Solution
The fourth proportional to 138,340.80, 207,511.20 and 122,011.20 is: 183,016.80
Step by Step Solution
- Step 1: Write the proportion equation
138,340.80 : 207,511.20 = 122,011.20 : x - Step 2: Convert to fraction form
138,340.80/207,511.20 = 122,011.20/x - Step 3: Cross multiply
138,340.80x = 207,511.20 × 122,011.20 - Step 4: Simplify right side
138,340.80x = 25,318,690,525.44 - Step 5: Solve for x
x = 25,318,690,525.44/138,340.80 - Step 6: Final answer
x = 183,016.80
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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.