Finding the Fourth Proportional to 128,341.20, 177,101.87 and 74,622.41
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Solution
The fourth proportional to 128,341.20, 177,101.87 and 74,622.41 is: 102,973.69
Step by Step Solution
- Step 1: Write the proportion equation
128,341.20 : 177,101.87 = 74,622.41 : x - Step 2: Convert to fraction form
128,341.20/177,101.87 = 74,622.41/x - Step 3: Cross multiply
128,341.20x = 177,101.87 × 74,622.41 - Step 4: Simplify right side
128,341.20x = 13,215,767,096.29 - Step 5: Solve for x
x = 13,215,767,096.29/128,341.20 - Step 6: Final answer
x = 102,973.69
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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.