Finding the Fourth Proportional to 128,523,415.19, 192,791,322.95 and 42,259,912.07
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Solution
The fourth proportional to 128,523,415.19, 192,791,322.95 and 42,259,912.07 is: 63,391,906.78
Step by Step Solution
- Step 1: Write the proportion equation
128,523,415.19 : 192,791,322.95 = 42,259,912.07 : x - Step 2: Convert to fraction form
128,523,415.19/192,791,322.95 = 42,259,912.07/x - Step 3: Cross multiply
128,523,415.19x = 192,791,322.95 × 42,259,912.07 - Step 4: Simplify right side
128,523,415.19x = 8,147,344,354,550,716 - Step 5: Solve for x
x = 8,147,344,354,550,716/128,523,415.19 - Step 6: Final answer
x = 63,391,906.78
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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.