Finding the Fourth Proportional to 138,430.35, 190,621.74 and 128,382.99
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Solution
The fourth proportional to 138,430.35, 190,621.74 and 128,382.99 is: 176,786.30
Step by Step Solution
- Step 1: Write the proportion equation
138,430.35 : 190,621.74 = 128,382.99 : x - Step 2: Convert to fraction form
138,430.35/190,621.74 = 128,382.99/x - Step 3: Cross multiply
138,430.35x = 190,621.74 × 128,382.99 - Step 4: Simplify right side
138,430.35x = 24,472,588,940.20 - Step 5: Solve for x
x = 24,472,588,940.20/138,430.35 - Step 6: Final answer
x = 176,786.30
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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.