Finding the Fourth Proportional to 76,731,865.80, 105,936,899.94 and 49,934,730.84
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Solution
The fourth proportional to 76,731,865.80, 105,936,899.94 and 49,934,730.84 is: 68,940,465.99
Step by Step Solution
- Step 1: Write the proportion equation
76,731,865.80 : 105,936,899.94 = 49,934,730.84 : x - Step 2: Convert to fraction form
76,731,865.80/105,936,899.94 = 49,934,730.84/x - Step 3: Cross multiply
76,731,865.80x = 105,936,899.94 × 49,934,730.84 - Step 4: Simplify right side
76,731,865.80x = 5,289,930,584,527,912 - Step 5: Solve for x
x = 5,289,930,584,527,912/76,731,865.80 - Step 6: Final answer
x = 68,940,465.99
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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.