Finding the Fourth Proportional to 129,246.30, 193,869.45 and 99,721.80
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Solution
The fourth proportional to 129,246.30, 193,869.45 and 99,721.80 is: 149,582.70
Step by Step Solution
- Step 1: Write the proportion equation
129,246.30 : 193,869.45 = 99,721.80 : x - Step 2: Convert to fraction form
129,246.30/193,869.45 = 99,721.80/x - Step 3: Cross multiply
129,246.30x = 193,869.45 × 99,721.80 - Step 4: Simplify right side
129,246.30x = 19,333,010,519.01 - Step 5: Solve for x
x = 19,333,010,519.01/129,246.30 - Step 6: Final answer
x = 149,582.70
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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.