Finding the Fourth Proportional to 91,314.11, 136,965.09 and 28,979.75
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Solution
The fourth proportional to 91,314.11, 136,965.09 and 28,979.75 is: 43,467.70
Step by Step Solution
- Step 1: Write the proportion equation
91,314.11 : 136,965.09 = 28,979.75 : x - Step 2: Convert to fraction form
91,314.11/136,965.09 = 28,979.75/x - Step 3: Cross multiply
91,314.11x = 136,965.09 × 28,979.75 - Step 4: Simplify right side
91,314.11x = 3,969,214,066.93 - Step 5: Solve for x
x = 3,969,214,066.93/91,314.11 - Step 6: Final answer
x = 43,467.70
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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.