Finding the Fourth Proportional to 139,428.08, 209,141.84 and 39,589.20
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Solution
The fourth proportional to 139,428.08, 209,141.84 and 39,589.20 is: 59,383.72
Step by Step Solution
- Step 1: Write the proportion equation
139,428.08 : 209,141.84 = 39,589.20 : x - Step 2: Convert to fraction form
139,428.08/209,141.84 = 39,589.20/x - Step 3: Cross multiply
139,428.08x = 209,141.84 × 39,589.20 - Step 4: Simplify right side
139,428.08x = 8,279,758,132.13 - Step 5: Solve for x
x = 8,279,758,132.13/139,428.08 - Step 6: Final answer
x = 59,383.72
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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.