Finding the Fourth Proportional to 86,421.09, 129,629.21 and 47,226.41
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Solution
The fourth proportional to 86,421.09, 129,629.21 and 47,226.41 is: 70,838.28
Step by Step Solution
- Step 1: Write the proportion equation
86,421.09 : 129,629.21 = 47,226.41 : x - Step 2: Convert to fraction form
86,421.09/129,629.21 = 47,226.41/x - Step 3: Cross multiply
86,421.09x = 129,629.21 × 47,226.41 - Step 4: Simplify right side
86,421.09x = 6,121,921,335.16 - Step 5: Solve for x
x = 6,121,921,335.16/86,421.09 - Step 6: Final answer
x = 70,838.28
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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.