Finding the Fourth Proportional to 128,798.36, 192,947.36 and 72,466.70
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Solution
The fourth proportional to 128,798.36, 192,947.36 and 72,466.70 is: 108,559.29
Step by Step Solution
- Step 1: Write the proportion equation
128,798.36 : 192,947.36 = 72,466.70 : x - Step 2: Convert to fraction form
128,798.36/192,947.36 = 72,466.70/x - Step 3: Cross multiply
128,798.36x = 192,947.36 × 72,466.70 - Step 4: Simplify right side
128,798.36x = 13,982,258,452.91 - Step 5: Solve for x
x = 13,982,258,452.91/128,798.36 - Step 6: Final answer
x = 108,559.29
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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.