Finding the Fourth Proportional to 135,621.80, 203,436.30 and 42,129.80
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Solution
The fourth proportional to 135,621.80, 203,436.30 and 42,129.80 is: 63,195.82
Step by Step Solution
- Step 1: Write the proportion equation
135,621.80 : 203,436.30 = 42,129.80 : x - Step 2: Convert to fraction form
135,621.80/203,436.30 = 42,129.80/x - Step 3: Cross multiply
135,621.80x = 203,436.30 × 42,129.80 - Step 4: Simplify right side
135,621.80x = 8,570,730,631.74 - Step 5: Solve for x
x = 8,570,730,631.74/135,621.80 - Step 6: Final answer
x = 63,195.82
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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.