Finding the Fourth Proportional to 73,968.80, 110,956.80 and 20,660.72
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Solution
The fourth proportional to 73,968.80, 110,956.80 and 20,660.72 is: 30,992.09
Step by Step Solution
- Step 1: Write the proportion equation
73,968.80 : 110,956.80 = 20,660.72 : x - Step 2: Convert to fraction form
73,968.80/110,956.80 = 20,660.72/x - Step 3: Cross multiply
73,968.80x = 110,956.80 × 20,660.72 - Step 4: Simplify right side
73,968.80x = 2,292,447,376.90 - Step 5: Solve for x
x = 2,292,447,376.90/73,968.80 - Step 6: Final answer
x = 30,992.09
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.