Finding the Fourth Proportional to 128,148.72, 176,837.90 and 76,524.07
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Solution
The fourth proportional to 128,148.72, 176,837.90 and 76,524.07 is: 105,598.84
Step by Step Solution
- Step 1: Write the proportion equation
128,148.72 : 176,837.90 = 76,524.07 : x - Step 2: Convert to fraction form
128,148.72/176,837.90 = 76,524.07/x - Step 3: Cross multiply
128,148.72x = 176,837.90 × 76,524.07 - Step 4: Simplify right side
128,148.72x = 13,532,356,120.21 - Step 5: Solve for x
x = 13,532,356,120.21/128,148.72 - Step 6: Final answer
x = 105,598.84
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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.