Finding the Fourth Proportional to 143,419,125.80, 215,128,688.70 and 91,763,060.60
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Solution
The fourth proportional to 143,419,125.80, 215,128,688.70 and 91,763,060.60 is: 137,644,590.90
Step by Step Solution
- Step 1: Write the proportion equation
143,419,125.80 : 215,128,688.70 = 91,763,060.60 : x - Step 2: Convert to fraction form
143,419,125.80/215,128,688.70 = 91,763,060.60/x - Step 3: Cross multiply
143,419,125.80x = 215,128,688.70 × 91,763,060.60 - Step 4: Simplify right side
143,419,125.80x = 19,740,866,897,976,632 - Step 5: Solve for x
x = 19,740,866,897,976,632/143,419,125.80 - Step 6: Final answer
x = 137,644,590.90
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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.