Finding the Fourth Proportional to 81,729,912.28, 122,595,319.86 and 20,319,071.08
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Solution
The fourth proportional to 81,729,912.28, 122,595,319.86 and 20,319,071.08 is: 30,478,718.85
Step by Step Solution
- Step 1: Write the proportion equation
81,729,912.28 : 122,595,319.86 = 20,319,071.08 : x - Step 2: Convert to fraction form
81,729,912.28/122,595,319.86 = 20,319,071.08/x - Step 3: Cross multiply
81,729,912.28x = 122,595,319.86 × 20,319,071.08 - Step 4: Simplify right side
81,729,912.28x = 2,491,023,018,310,675.50 - Step 5: Solve for x
x = 2,491,023,018,310,675.50/81,729,912.28 - Step 6: Final answer
x = 30,478,718.85
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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.