Finding the Fourth Proportional to 128,614.28, 177,487.84 and 72,025.65
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Solution
The fourth proportional to 128,614.28, 177,487.84 and 72,025.65 is: 99,395.48
Step by Step Solution
- Step 1: Write the proportion equation
128,614.28 : 177,487.84 = 72,025.65 : x - Step 2: Convert to fraction form
128,614.28/177,487.84 = 72,025.65/x - Step 3: Cross multiply
128,614.28x = 177,487.84 × 72,025.65 - Step 4: Simplify right side
128,614.28x = 12,783,677,043.10 - Step 5: Solve for x
x = 12,783,677,043.10/128,614.28 - Step 6: Final answer
x = 99,395.48
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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.