Finding the Fourth Proportional to 98,415.15, 135,878.28 and 75,714.09
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Solution
The fourth proportional to 98,415.15, 135,878.28 and 75,714.09 is: 104,535.74
Step by Step Solution
- Step 1: Write the proportion equation
98,415.15 : 135,878.28 = 75,714.09 : x - Step 2: Convert to fraction form
98,415.15/135,878.28 = 75,714.09/x - Step 3: Cross multiply
98,415.15x = 135,878.28 × 75,714.09 - Step 4: Simplify right side
98,415.15x = 10,287,900,320.97 - Step 5: Solve for x
x = 10,287,900,320.97/98,415.15 - Step 6: Final answer
x = 104,535.74
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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.