Finding the Fourth Proportional to 98,720.64, 136,236.48 and 54,011.52
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Solution
The fourth proportional to 98,720.64, 136,236.48 and 54,011.52 is: 74,536.99
Step by Step Solution
- Step 1: Write the proportion equation
98,720.64 : 136,236.48 = 54,011.52 : x - Step 2: Convert to fraction form
98,720.64/136,236.48 = 54,011.52/x - Step 3: Cross multiply
98,720.64x = 136,236.48 × 54,011.52 - Step 4: Simplify right side
98,720.64x = 7,358,339,364.25 - Step 5: Solve for x
x = 7,358,339,364.25/98,720.64 - Step 6: Final answer
x = 74,536.99
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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.