Finding the Fourth Proportional to 81,686,737.80, 122,530,106.70 and 71,609,041.80
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Solution
The fourth proportional to 81,686,737.80, 122,530,106.70 and 71,609,041.80 is: 107,413,562.70
Step by Step Solution
- Step 1: Write the proportion equation
81,686,737.80 : 122,530,106.70 = 71,609,041.80 : x - Step 2: Convert to fraction form
81,686,737.80/122,530,106.70 = 71,609,041.80/x - Step 3: Cross multiply
81,686,737.80x = 122,530,106.70 × 71,609,041.80 - Step 4: Simplify right side
81,686,737.80x = 8,774,263,532,438,760 - Step 5: Solve for x
x = 8,774,263,532,438,760/81,686,737.80 - Step 6: Final answer
x = 107,413,562.70
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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.