Finding the Fourth Proportional to 128,112.80, 192,169.20 and 115,671.20
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Solution
The fourth proportional to 128,112.80, 192,169.20 and 115,671.20 is: 173,506.80
Step by Step Solution
- Step 1: Write the proportion equation
128,112.80 : 192,169.20 = 115,671.20 : x - Step 2: Convert to fraction form
128,112.80/192,169.20 = 115,671.20/x - Step 3: Cross multiply
128,112.80x = 192,169.20 × 115,671.20 - Step 4: Simplify right side
128,112.80x = 22,228,441,967.04 - Step 5: Solve for x
x = 22,228,441,967.04/128,112.80 - Step 6: Final answer
x = 173,506.80
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1.5x scale
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.