Finding the Fourth Proportional to 158,163.20, 218,263.28 and 86,542.40
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Solution
The fourth proportional to 158,163.20, 218,263.28 and 86,542.40 is: 119,427.45
Step by Step Solution
- Step 1: Write the proportion equation
158,163.20 : 218,263.28 = 86,542.40 : x - Step 2: Convert to fraction form
158,163.20/218,263.28 = 86,542.40/x - Step 3: Cross multiply
158,163.20x = 218,263.28 × 86,542.40 - Step 4: Simplify right side
158,163.20x = 18,889,028,083.07 - Step 5: Solve for x
x = 18,889,028,083.07/158,163.20 - Step 6: Final answer
x = 119,427.45
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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.