Finding the Fourth Proportional to 139,976.76, 193,163.04 and 76,313.28
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Solution
The fourth proportional to 139,976.76, 193,163.04 and 76,313.28 is: 105,309.66
Step by Step Solution
- Step 1: Write the proportion equation
139,976.76 : 193,163.04 = 76,313.28 : x - Step 2: Convert to fraction form
139,976.76/193,163.04 = 76,313.28/x - Step 3: Cross multiply
139,976.76x = 193,163.04 × 76,313.28 - Step 4: Simplify right side
139,976.76x = 14,740,905,157.17 - Step 5: Solve for x
x = 14,740,905,157.17/139,976.76 - Step 6: Final answer
x = 105,309.66
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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.