Finding the Fourth Proportional to 140,212.70, 210,319.05 and 81,163.70
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Solution
The fourth proportional to 140,212.70, 210,319.05 and 81,163.70 is: 121,745.55
Step by Step Solution
- Step 1: Write the proportion equation
140,212.70 : 210,319.05 = 81,163.70 : x - Step 2: Convert to fraction form
140,212.70/210,319.05 = 81,163.70/x - Step 3: Cross multiply
140,212.70x = 210,319.05 × 81,163.70 - Step 4: Simplify right side
140,212.70x = 17,070,272,278.49 - Step 5: Solve for x
x = 17,070,272,278.49/140,212.70 - Step 6: Final answer
x = 121,745.55
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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.