Finding the Fourth Proportional to 163,631.70, 245,447.55 and 80,687.70
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Solution
The fourth proportional to 163,631.70, 245,447.55 and 80,687.70 is: 121,031.55
Step by Step Solution
- Step 1: Write the proportion equation
163,631.70 : 245,447.55 = 80,687.70 : x - Step 2: Convert to fraction form
163,631.70/245,447.55 = 80,687.70/x - Step 3: Cross multiply
163,631.70x = 245,447.55 × 80,687.70 - Step 4: Simplify right side
163,631.70x = 19,804,598,280.14 - Step 5: Solve for x
x = 19,804,598,280.14/163,631.70 - Step 6: Final answer
x = 121,031.55
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1.5x scale
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.