Finding the Fourth Proportional to 128,432.79, 177,250.59 and 73,986.84
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Solution
The fourth proportional to 128,432.79, 177,250.59 and 73,986.84 is: 102,109.52
Step by Step Solution
- Step 1: Write the proportion equation
128,432.79 : 177,250.59 = 73,986.84 : x - Step 2: Convert to fraction form
128,432.79/177,250.59 = 73,986.84/x - Step 3: Cross multiply
128,432.79x = 177,250.59 × 73,986.84 - Step 4: Simplify right side
128,432.79x = 13,114,211,042.24 - Step 5: Solve for x
x = 13,114,211,042.24/128,432.79 - Step 6: Final answer
x = 102,109.52
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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.