Finding the Fourth Proportional to 103,920.06, 155,921.26 and 54,031.62
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Solution
The fourth proportional to 103,920.06, 155,921.26 and 54,031.62 is: 81,068.84
Step by Step Solution
- Step 1: Write the proportion equation
103,920.06 : 155,921.26 = 54,031.62 : x - Step 2: Convert to fraction form
103,920.06/155,921.26 = 54,031.62/x - Step 3: Cross multiply
103,920.06x = 155,921.26 × 54,031.62 - Step 4: Simplify right side
103,920.06x = 8,424,678,270.24 - Step 5: Solve for x
x = 8,424,678,270.24/103,920.06 - Step 6: Final answer
x = 81,068.84
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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.