Finding the Fourth Proportional to 120,309.94, 180,363.40 and 75,838.65
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Solution
The fourth proportional to 120,309.94, 180,363.40 and 75,838.65 is: 113,693.99
Step by Step Solution
- Step 1: Write the proportion equation
120,309.94 : 180,363.40 = 75,838.65 : x - Step 2: Convert to fraction form
120,309.94/180,363.40 = 75,838.65/x - Step 3: Cross multiply
120,309.94x = 180,363.40 × 75,838.65 - Step 4: Simplify right side
120,309.94x = 13,678,516,765.41 - Step 5: Solve for x
x = 13,678,516,765.41/120,309.94 - Step 6: Final answer
x = 113,693.99
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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.