Finding the Fourth Proportional to 85,840.68, 128,779.56 and 35,239.80
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Solution
The fourth proportional to 85,840.68, 128,779.56 and 35,239.80 is: 52,867.31
Step by Step Solution
- Step 1: Write the proportion equation
85,840.68 : 128,779.56 = 35,239.80 : x - Step 2: Convert to fraction form
85,840.68/128,779.56 = 35,239.80/x - Step 3: Cross multiply
85,840.68x = 128,779.56 × 35,239.80 - Step 4: Simplify right side
85,840.68x = 4,538,165,938.49 - Step 5: Solve for x
x = 4,538,165,938.49/85,840.68 - Step 6: Final answer
x = 52,867.31
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.