Finding the Fourth Proportional to 278,795.41, 418,403.42 and 129,140.70
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Solution
The fourth proportional to 278,795.41, 418,403.42 and 129,140.70 is: 193,808.47
Step by Step Solution
- Step 1: Write the proportion equation
278,795.41 : 418,403.42 = 129,140.70 : x - Step 2: Convert to fraction form
278,795.41/418,403.42 = 129,140.70/x - Step 3: Cross multiply
278,795.41x = 418,403.42 × 129,140.70 - Step 4: Simplify right side
278,795.41x = 54,032,910,541.19 - Step 5: Solve for x
x = 54,032,910,541.19/278,795.41 - Step 6: Final answer
x = 193,808.47
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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.