Finding the Fourth Proportional to 128,246.40, 192,369.60 and 118,915.20
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Solution
The fourth proportional to 128,246.40, 192,369.60 and 118,915.20 is: 178,372.80
Step by Step Solution
- Step 1: Write the proportion equation
128,246.40 : 192,369.60 = 118,915.20 : x - Step 2: Convert to fraction form
128,246.40/192,369.60 = 118,915.20/x - Step 3: Cross multiply
128,246.40x = 192,369.60 × 118,915.20 - Step 4: Simplify right side
128,246.40x = 22,875,669,457.92 - Step 5: Solve for x
x = 22,875,669,457.92/128,246.40 - Step 6: Final answer
x = 178,372.80
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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.