Finding the Fourth Proportional to 100,137.12, 138,135.96 and 61,918.08
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Solution
The fourth proportional to 100,137.12, 138,135.96 and 61,918.08 is: 85,414.01
Step by Step Solution
- Step 1: Write the proportion equation
100,137.12 : 138,135.96 = 61,918.08 : x - Step 2: Convert to fraction form
100,137.12/138,135.96 = 61,918.08/x - Step 3: Cross multiply
100,137.12x = 138,135.96 × 61,918.08 - Step 4: Simplify right side
100,137.12x = 8,553,113,422.16 - Step 5: Solve for x
x = 8,553,113,422.16/100,137.12 - Step 6: Final answer
x = 85,414.01
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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.