Finding the Fourth Proportional to 98,721.75, 136,236.02 and 54,009.75
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Solution
The fourth proportional to 98,721.75, 136,236.02 and 54,009.75 is: 74,533.46
Step by Step Solution
- Step 1: Write the proportion equation
98,721.75 : 136,236.02 = 54,009.75 : x - Step 2: Convert to fraction form
98,721.75/136,236.02 = 54,009.75/x - Step 3: Cross multiply
98,721.75x = 136,236.02 × 54,009.75 - Step 4: Simplify right side
98,721.75x = 7,358,073,111.15 - Step 5: Solve for x
x = 7,358,073,111.15/98,721.75 - Step 6: Final answer
x = 74,533.46
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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.