Finding the Fourth Proportional to 77,270.20, 115,905.30 and 47,745.70
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Solution
The fourth proportional to 77,270.20, 115,905.30 and 47,745.70 is: 71,618.55
Step by Step Solution
- Step 1: Write the proportion equation
77,270.20 : 115,905.30 = 47,745.70 : x - Step 2: Convert to fraction form
77,270.20/115,905.30 = 47,745.70/x - Step 3: Cross multiply
77,270.20x = 115,905.30 × 47,745.70 - Step 4: Simplify right side
77,270.20x = 5,533,979,682.21 - Step 5: Solve for x
x = 5,533,979,682.21/77,270.20 - Step 6: Final answer
x = 71,618.55
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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.