Finding the Fourth Proportional to 138,977.13, 208,447.26 and 39,145.17
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Solution
The fourth proportional to 138,977.13, 208,447.26 and 39,145.17 is: 58,712.56
Step by Step Solution
- Step 1: Write the proportion equation
138,977.13 : 208,447.26 = 39,145.17 : x - Step 2: Convert to fraction form
138,977.13/208,447.26 = 39,145.17/x - Step 3: Cross multiply
138,977.13x = 208,447.26 × 39,145.17 - Step 4: Simplify right side
138,977.13x = 8,159,703,428.73 - Step 5: Solve for x
x = 8,159,703,428.73/138,977.13 - Step 6: Final answer
x = 58,712.56
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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.