Finding the Fourth Proportional to 105,722.62, 145,890.09 and 57,974.95
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Solution
The fourth proportional to 105,722.62, 145,890.09 and 57,974.95 is: 80,001.52
Step by Step Solution
- Step 1: Write the proportion equation
105,722.62 : 145,890.09 = 57,974.95 : x - Step 2: Convert to fraction form
105,722.62/145,890.09 = 57,974.95/x - Step 3: Cross multiply
105,722.62x = 145,890.09 × 57,974.95 - Step 4: Simplify right side
105,722.62x = 8,457,970,673.25 - Step 5: Solve for x
x = 8,457,970,673.25/105,722.62 - Step 6: Final answer
x = 80,001.52
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.