Finding the Fourth Proportional to 128,571,463.62, 177,430,957.20 and 72,828,457.74
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Solution
The fourth proportional to 128,571,463.62, 177,430,957.20 and 72,828,457.74 is: 100,504,595.69
Step by Step Solution
- Step 1: Write the proportion equation
128,571,463.62 : 177,430,957.20 = 72,828,457.74 : x - Step 2: Convert to fraction form
128,571,463.62/177,430,957.20 = 72,828,457.74/x - Step 3: Cross multiply
128,571,463.62x = 177,430,957.20 × 72,828,457.74 - Step 4: Simplify right side
128,571,463.62x = 12,922,022,968,207,946 - Step 5: Solve for x
x = 12,922,022,968,207,946/128,571,463.62 - Step 6: Final answer
x = 100,504,595.69
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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.