Finding the Fourth Proportional to 215,694.10, 297,680.11 and 129,681.21
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Solution
The fourth proportional to 215,694.10, 297,680.11 and 129,681.21 is: 178,973.45
Step by Step Solution
- Step 1: Write the proportion equation
215,694.10 : 297,680.11 = 129,681.21 : x - Step 2: Convert to fraction form
215,694.10/297,680.11 = 129,681.21/x - Step 3: Cross multiply
215,694.10x = 297,680.11 × 129,681.21 - Step 4: Simplify right side
215,694.10x = 38,603,517,542.06 - Step 5: Solve for x
x = 38,603,517,542.06/215,694.10 - Step 6: Final answer
x = 178,973.45
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.