Finding the Fourth Proportional to 128,028.98, 176,701.56 and 74,358.92
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Solution
The fourth proportional to 128,028.98, 176,701.56 and 74,358.92 is: 102,627.84
Step by Step Solution
- Step 1: Write the proportion equation
128,028.98 : 176,701.56 = 74,358.92 : x - Step 2: Convert to fraction form
128,028.98/176,701.56 = 74,358.92/x - Step 3: Cross multiply
128,028.98x = 176,701.56 × 74,358.92 - Step 4: Simplify right side
128,028.98x = 13,139,337,163.92 - Step 5: Solve for x
x = 13,139,337,163.92/128,028.98 - Step 6: Final answer
x = 102,627.84
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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.