Finding the Fourth Proportional to 128,164.41, 192,154.28 and 78,232.77
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Solution
The fourth proportional to 128,164.41, 192,154.28 and 78,232.77 is: 117,292.79
Step by Step Solution
- Step 1: Write the proportion equation
128,164.41 : 192,154.28 = 78,232.77 : x - Step 2: Convert to fraction form
128,164.41/192,154.28 = 78,232.77/x - Step 3: Cross multiply
128,164.41x = 192,154.28 × 78,232.77 - Step 4: Simplify right side
128,164.41x = 15,032,761,200.59 - Step 5: Solve for x
x = 15,032,761,200.59/128,164.41 - Step 6: Final answer
x = 117,292.79
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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.