Finding the Fourth Proportional to 138,511.80, 207,249.30 and 91,855.80
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Solution
The fourth proportional to 138,511.80, 207,249.30 and 91,855.80 is: 137,439.92
Step by Step Solution
- Step 1: Write the proportion equation
138,511.80 : 207,249.30 = 91,855.80 : x - Step 2: Convert to fraction form
138,511.80/207,249.30 = 91,855.80/x - Step 3: Cross multiply
138,511.80x = 207,249.30 × 91,855.80 - Step 4: Simplify right side
138,511.80x = 19,037,050,250.94 - Step 5: Solve for x
x = 19,037,050,250.94/138,511.80 - Step 6: Final answer
x = 137,439.92
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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.