Finding the Fourth Proportional to 112,370.44, 154,987.14 and 78,380.68
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Solution
The fourth proportional to 112,370.44, 154,987.14 and 78,380.68 is: 108,106.70
Step by Step Solution
- Step 1: Write the proportion equation
112,370.44 : 154,987.14 = 78,380.68 : x - Step 2: Convert to fraction form
112,370.44/154,987.14 = 78,380.68/x - Step 3: Cross multiply
112,370.44x = 154,987.14 × 78,380.68 - Step 4: Simplify right side
112,370.44x = 12,147,997,424.46 - Step 5: Solve for x
x = 12,147,997,424.46/112,370.44 - Step 6: Final answer
x = 108,106.70
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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.