Finding the Fourth Proportional to 128,380.99, 177,160.48 and 70,236.76
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Solution
The fourth proportional to 128,380.99, 177,160.48 and 70,236.76 is: 96,923.84
Step by Step Solution
- Step 1: Write the proportion equation
128,380.99 : 177,160.48 = 70,236.76 : x - Step 2: Convert to fraction form
128,380.99/177,160.48 = 70,236.76/x - Step 3: Cross multiply
128,380.99x = 177,160.48 × 70,236.76 - Step 4: Simplify right side
128,380.99x = 12,443,178,115.24 - Step 5: Solve for x
x = 12,443,178,115.24/128,380.99 - Step 6: Final answer
x = 96,923.84
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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.