Finding the Fourth Proportional to 86,779.12, 119,716.56 and 56,557.44
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Solution
The fourth proportional to 86,779.12, 119,716.56 and 56,557.44 is: 78,024.09
Step by Step Solution
- Step 1: Write the proportion equation
86,779.12 : 119,716.56 = 56,557.44 : x - Step 2: Convert to fraction form
86,779.12/119,716.56 = 56,557.44/x - Step 3: Cross multiply
86,779.12x = 119,716.56 × 56,557.44 - Step 4: Simplify right side
86,779.12x = 6,770,862,159.21 - Step 5: Solve for x
x = 6,770,862,159.21/86,779.12 - Step 6: Final answer
x = 78,024.09
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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.