Finding the Fourth Proportional to 128,764,957.86, 177,605,698.41 and 87,440,105.70
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Solution
The fourth proportional to 128,764,957.86, 177,605,698.41 and 87,440,105.70 is: 120,606,268.20
Step by Step Solution
- Step 1: Write the proportion equation
128,764,957.86 : 177,605,698.41 = 87,440,105.70 : x - Step 2: Convert to fraction form
128,764,957.86/177,605,698.41 = 87,440,105.70/x - Step 3: Cross multiply
128,764,957.86x = 177,605,698.41 × 87,440,105.70 - Step 4: Simplify right side
128,764,957.86x = 15,529,861,041,892,722 - Step 5: Solve for x
x = 15,529,861,041,892,722/128,764,957.86 - Step 6: Final answer
x = 120,606,268.20
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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.