Finding the Fourth Proportional to 84,587.20, 126,880.80 and 69,812.80
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Solution
The fourth proportional to 84,587.20, 126,880.80 and 69,812.80 is: 104,719.20
Step by Step Solution
- Step 1: Write the proportion equation
84,587.20 : 126,880.80 = 69,812.80 : x - Step 2: Convert to fraction form
84,587.20/126,880.80 = 69,812.80/x - Step 3: Cross multiply
84,587.20x = 126,880.80 × 69,812.80 - Step 4: Simplify right side
84,587.20x = 8,857,903,914.24 - Step 5: Solve for x
x = 8,857,903,914.24/84,587.20 - Step 6: Final answer
x = 104,719.20
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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.