Finding the Fourth Proportional to 129,913.20, 194,869.80 and 94,921.20
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Solution
The fourth proportional to 129,913.20, 194,869.80 and 94,921.20 is: 142,381.80
Step by Step Solution
- Step 1: Write the proportion equation
129,913.20 : 194,869.80 = 94,921.20 : x - Step 2: Convert to fraction form
129,913.20/194,869.80 = 94,921.20/x - Step 3: Cross multiply
129,913.20x = 194,869.80 × 94,921.20 - Step 4: Simplify right side
129,913.20x = 18,497,275,259.76 - Step 5: Solve for x
x = 18,497,275,259.76/129,913.20 - Step 6: Final answer
x = 142,381.80
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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.