Finding the Fourth Proportional to 86,071.68, 129,610.80 and 75,109.68
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Solution
The fourth proportional to 86,071.68, 129,610.80 and 75,109.68 is: 113,103.70
Step by Step Solution
- Step 1: Write the proportion equation
86,071.68 : 129,610.80 = 75,109.68 : x - Step 2: Convert to fraction form
86,071.68/129,610.80 = 75,109.68/x - Step 3: Cross multiply
86,071.68x = 129,610.80 × 75,109.68 - Step 4: Simplify right side
86,071.68x = 9,735,025,712.54 - Step 5: Solve for x
x = 9,735,025,712.54/86,071.68 - Step 6: Final answer
x = 113,103.70
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.