Finding the Fourth Proportional to 139,226.40, 192,116.49 and 77,964.05
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Solution
The fourth proportional to 139,226.40, 192,116.49 and 77,964.05 is: 107,581.46
Step by Step Solution
- Step 1: Write the proportion equation
139,226.40 : 192,116.49 = 77,964.05 : x - Step 2: Convert to fraction form
139,226.40/192,116.49 = 77,964.05/x - Step 3: Cross multiply
139,226.40x = 192,116.49 × 77,964.05 - Step 4: Simplify right side
139,226.40x = 14,978,179,632.18 - Step 5: Solve for x
x = 14,978,179,632.18/139,226.40 - Step 6: Final answer
x = 107,581.46
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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.