Finding the Fourth Proportional to 115,911.70, 173,867.55 and 74,439.70
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Solution
The fourth proportional to 115,911.70, 173,867.55 and 74,439.70 is: 111,659.55
Step by Step Solution
- Step 1: Write the proportion equation
115,911.70 : 173,867.55 = 74,439.70 : x - Step 2: Convert to fraction form
115,911.70/173,867.55 = 74,439.70/x - Step 3: Cross multiply
115,911.70x = 173,867.55 × 74,439.70 - Step 4: Simplify right side
115,911.70x = 12,942,648,261.74 - Step 5: Solve for x
x = 12,942,648,261.74/115,911.70 - Step 6: Final answer
x = 111,659.55
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1.5x scale
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.