Finding the Fourth Proportional to 231,512,520.10, 319,475,545.05 and 137,430,688.54
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Solution
The fourth proportional to 231,512,520.10, 319,475,545.05 and 137,430,688.54 is: 189,647,385.42
Step by Step Solution
- Step 1: Write the proportion equation
231,512,520.10 : 319,475,545.05 = 137,430,688.54 : x - Step 2: Convert to fraction form
231,512,520.10/319,475,545.05 = 137,430,688.54/x - Step 3: Cross multiply
231,512,520.10x = 319,475,545.05 × 137,430,688.54 - Step 4: Simplify right side
231,512,520.10x = 43,905,744,127,913,288 - Step 5: Solve for x
x = 43,905,744,127,913,288/231,512,520.10 - Step 6: Final answer
x = 189,647,385.42
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.