Finding the Fourth Proportional to 128,370.54, 177,137.72 and 71,000.75
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Solution
The fourth proportional to 128,370.54, 177,137.72 and 71,000.75 is: 97,973.50
Step by Step Solution
- Step 1: Write the proportion equation
128,370.54 : 177,137.72 = 71,000.75 : x - Step 2: Convert to fraction form
128,370.54/177,137.72 = 71,000.75/x - Step 3: Cross multiply
128,370.54x = 177,137.72 × 71,000.75 - Step 4: Simplify right side
128,370.54x = 12,576,911,327.38 - Step 5: Solve for x
x = 12,576,911,327.38/128,370.54 - Step 6: Final answer
x = 97,973.50
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.