Finding the Fourth Proportional to 158,418.63, 218,811.93 and 128,238.03
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Solution
The fourth proportional to 158,418.63, 218,811.93 and 128,238.03 is: 177,125.70
Step by Step Solution
- Step 1: Write the proportion equation
158,418.63 : 218,811.93 = 128,238.03 : x - Step 2: Convert to fraction form
158,418.63/218,811.93 = 128,238.03/x - Step 3: Cross multiply
158,418.63x = 218,811.93 × 128,238.03 - Step 4: Simplify right side
158,418.63x = 28,060,010,843.70 - Step 5: Solve for x
x = 28,060,010,843.70/158,418.63 - Step 6: Final answer
x = 177,125.70
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1.5x scale
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.