Finding the Fourth Proportional to 84,486.60, 126,379.80 and 76,788.36
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Solution
The fourth proportional to 84,486.60, 126,379.80 and 76,788.36 is: 114,864.34
Step by Step Solution
- Step 1: Write the proportion equation
84,486.60 : 126,379.80 = 76,788.36 : x - Step 2: Convert to fraction form
84,486.60/126,379.80 = 76,788.36/x - Step 3: Cross multiply
84,486.60x = 126,379.80 × 76,788.36 - Step 4: Simplify right side
84,486.60x = 9,704,497,579.13 - Step 5: Solve for x
x = 9,704,497,579.13/84,486.60 - Step 6: Final answer
x = 114,864.34
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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.