Finding the Fourth Proportional to 86,078.41, 129,138.44 and 29,910.38
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Solution
The fourth proportional to 86,078.41, 129,138.44 and 29,910.38 is: 44,872.80
Step by Step Solution
- Step 1: Write the proportion equation
86,078.41 : 129,138.44 = 29,910.38 : x - Step 2: Convert to fraction form
86,078.41/129,138.44 = 29,910.38/x - Step 3: Cross multiply
86,078.41x = 129,138.44 × 29,910.38 - Step 4: Simplify right side
86,078.41x = 3,862,579,017.76 - Step 5: Solve for x
x = 3,862,579,017.76/86,078.41 - Step 6: Final answer
x = 44,872.80
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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.