Finding the Fourth Proportional to 139,395.14, 192,366.64 and 78,964.49
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Solution
The fourth proportional to 139,395.14, 192,366.64 and 78,964.49 is: 108,971.76
Step by Step Solution
- Step 1: Write the proportion equation
139,395.14 : 192,366.64 = 78,964.49 : x - Step 2: Convert to fraction form
139,395.14/192,366.64 = 78,964.49/x - Step 3: Cross multiply
139,395.14x = 192,366.64 × 78,964.49 - Step 4: Simplify right side
139,395.14x = 15,190,133,229.22 - Step 5: Solve for x
x = 15,190,133,229.22/139,395.14 - Step 6: Final answer
x = 108,971.76
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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.