Finding the Fourth Proportional to 138,437.12, 207,655.68 and 79,231.52
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Solution
The fourth proportional to 138,437.12, 207,655.68 and 79,231.52 is: 118,847.28
Step by Step Solution
- Step 1: Write the proportion equation
138,437.12 : 207,655.68 = 79,231.52 : x - Step 2: Convert to fraction form
138,437.12/207,655.68 = 79,231.52/x - Step 3: Cross multiply
138,437.12x = 207,655.68 × 79,231.52 - Step 4: Simplify right side
138,437.12x = 16,452,875,163.03 - Step 5: Solve for x
x = 16,452,875,163.03/138,437.12 - Step 6: Final answer
x = 118,847.28
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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.