Finding the Fourth Proportional to 210,145,471.80, 315,218,207.70 and 129,523,903.80
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Solution
The fourth proportional to 210,145,471.80, 315,218,207.70 and 129,523,903.80 is: 194,285,855.70
Step by Step Solution
- Step 1: Write the proportion equation
210,145,471.80 : 315,218,207.70 = 129,523,903.80 : x - Step 2: Convert to fraction form
210,145,471.80/315,218,207.70 = 129,523,903.80/x - Step 3: Cross multiply
210,145,471.80x = 315,218,207.70 × 129,523,903.80 - Step 4: Simplify right side
210,145,471.80x = 40,828,292,810,143,216 - Step 5: Solve for x
x = 40,828,292,810,143,216/210,145,471.80 - Step 6: Final answer
x = 194,285,855.70
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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.