Finding the Fourth Proportional to 71,386.20, 107,079.30 and 68,105.70
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Solution
The fourth proportional to 71,386.20, 107,079.30 and 68,105.70 is: 102,158.55
Step by Step Solution
- Step 1: Write the proportion equation
71,386.20 : 107,079.30 = 68,105.70 : x - Step 2: Convert to fraction form
71,386.20/107,079.30 = 68,105.70/x - Step 3: Cross multiply
71,386.20x = 107,079.30 × 68,105.70 - Step 4: Simplify right side
71,386.20x = 7,292,710,682.01 - Step 5: Solve for x
x = 7,292,710,682.01/71,386.20 - Step 6: Final answer
x = 102,158.55
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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.