Finding the Fourth Proportional to 132,218,958.80, 198,328,438.20 and 78,471,246.80
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Solution
The fourth proportional to 132,218,958.80, 198,328,438.20 and 78,471,246.80 is: 117,706,870.20
Step by Step Solution
- Step 1: Write the proportion equation
132,218,958.80 : 198,328,438.20 = 78,471,246.80 : x - Step 2: Convert to fraction form
132,218,958.80/198,328,438.20 = 78,471,246.80/x - Step 3: Cross multiply
132,218,958.80x = 198,328,438.20 × 78,471,246.80 - Step 4: Simplify right side
132,218,958.80x = 15,563,079,821,450,746 - Step 5: Solve for x
x = 15,563,079,821,450,746/132,218,958.80 - Step 6: Final answer
x = 117,706,870.20
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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.