Finding the Fourth Proportional to 81,662,451.30, 122,493,676.95 and 70,576,985.70
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Solution
The fourth proportional to 81,662,451.30, 122,493,676.95 and 70,576,985.70 is: 105,865,478.55
Step by Step Solution
- Step 1: Write the proportion equation
81,662,451.30 : 122,493,676.95 = 70,576,985.70 : x - Step 2: Convert to fraction form
81,662,451.30/122,493,676.95 = 70,576,985.70/x - Step 3: Cross multiply
81,662,451.30x = 122,493,676.95 × 70,576,985.70 - Step 4: Simplify right side
81,662,451.30x = 8,645,234,486,440,570 - Step 5: Solve for x
x = 8,645,234,486,440,570/81,662,451.30 - Step 6: Final answer
x = 105,865,478.55
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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.