Finding the Fourth Proportional to 120,779.38, 180,355.73 and 98,636.68
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Solution
The fourth proportional to 120,779.38, 180,355.73 and 98,636.68 is: 147,290.79
Step by Step Solution
- Step 1: Write the proportion equation
120,779.38 : 180,355.73 = 98,636.68 : x - Step 2: Convert to fraction form
120,779.38/180,355.73 = 98,636.68/x - Step 3: Cross multiply
120,779.38x = 180,355.73 × 98,636.68 - Step 4: Simplify right side
120,779.38x = 17,789,690,426.18 - Step 5: Solve for x
x = 17,789,690,426.18/120,779.38 - Step 6: Final answer
x = 147,290.79
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.