Finding the Fourth Proportional to 128,214.21, 176,908.21 and 74,471.42
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Solution
The fourth proportional to 128,214.21, 176,908.21 and 74,471.42 is: 102,754.64
Step by Step Solution
- Step 1: Write the proportion equation
128,214.21 : 176,908.21 = 74,471.42 : x - Step 2: Convert to fraction form
128,214.21/176,908.21 = 74,471.42/x - Step 3: Cross multiply
128,214.21x = 176,908.21 × 74,471.42 - Step 4: Simplify right side
128,214.21x = 13,174,605,608.36 - Step 5: Solve for x
x = 13,174,605,608.36/128,214.21 - Step 6: Final answer
x = 102,754.64
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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.