Finding the Fourth Proportional to 427,584.16, 641,195.80 and 128,107.32
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Solution
The fourth proportional to 427,584.16, 641,195.80 and 128,107.32 is: 192,106.92
Step by Step Solution
- Step 1: Write the proportion equation
427,584.16 : 641,195.80 = 128,107.32 : x - Step 2: Convert to fraction form
427,584.16/641,195.80 = 128,107.32/x - Step 3: Cross multiply
427,584.16x = 641,195.80 × 128,107.32 - Step 4: Simplify right side
427,584.16x = 82,141,875,533.26 - Step 5: Solve for x
x = 82,141,875,533.26/427,584.16 - Step 6: Final answer
x = 192,106.92
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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.