Finding the Fourth Proportional to 128,953.42, 193,179.84 and 72,621.70
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Solution
The fourth proportional to 128,953.42, 193,179.84 and 72,621.70 is: 108,791.60
Step by Step Solution
- Step 1: Write the proportion equation
128,953.42 : 193,179.84 = 72,621.70 : x - Step 2: Convert to fraction form
128,953.42/193,179.84 = 72,621.70/x - Step 3: Cross multiply
128,953.42x = 193,179.84 × 72,621.70 - Step 4: Simplify right side
128,953.42x = 14,029,048,386.53 - Step 5: Solve for x
x = 14,029,048,386.53/128,953.42 - Step 6: Final answer
x = 108,791.60
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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.