Finding the Fourth Proportional to 128,852.56, 177,816.36 and 72,263.44
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Solution
The fourth proportional to 128,852.56, 177,816.36 and 72,263.44 is: 99,723.45
Step by Step Solution
- Step 1: Write the proportion equation
128,852.56 : 177,816.36 = 72,263.44 : x - Step 2: Convert to fraction form
128,852.56/177,816.36 = 72,263.44/x - Step 3: Cross multiply
128,852.56x = 177,816.36 × 72,263.44 - Step 4: Simplify right side
128,852.56x = 12,849,621,861.88 - Step 5: Solve for x
x = 12,849,621,861.88/128,852.56 - Step 6: Final answer
x = 99,723.45
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1.5x scale
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.