Finding the Fourth Proportional to 98,432.70, 135,837.09 and 53,720.70
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Solution
The fourth proportional to 98,432.70, 135,837.09 and 53,720.70 is: 74,134.55
Step by Step Solution
- Step 1: Write the proportion equation
98,432.70 : 135,837.09 = 53,720.70 : x - Step 2: Convert to fraction form
98,432.70/135,837.09 = 53,720.70/x - Step 3: Cross multiply
98,432.70x = 135,837.09 × 53,720.70 - Step 4: Simplify right side
98,432.70x = 7,297,263,560.76 - Step 5: Solve for x
x = 7,297,263,560.76/98,432.70 - Step 6: Final answer
x = 74,134.55
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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.