Finding the Fourth Proportional to 81,920.96, 113,051.04 and 48,393.92
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Solution
The fourth proportional to 81,920.96, 113,051.04 and 48,393.92 is: 66,783.68
Step by Step Solution
- Step 1: Write the proportion equation
81,920.96 : 113,051.04 = 48,393.92 : x - Step 2: Convert to fraction form
81,920.96/113,051.04 = 48,393.92/x - Step 3: Cross multiply
81,920.96x = 113,051.04 × 48,393.92 - Step 4: Simplify right side
81,920.96x = 5,470,982,985.68 - Step 5: Solve for x
x = 5,470,982,985.68/81,920.96 - Step 6: Final answer
x = 66,783.68
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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.