Finding the Fourth Proportional to 85,590.36, 128,397.84 and 26,430.60
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Solution
The fourth proportional to 85,590.36, 128,397.84 and 26,430.60 is: 39,649.70
Step by Step Solution
- Step 1: Write the proportion equation
85,590.36 : 128,397.84 = 26,430.60 : x - Step 2: Convert to fraction form
85,590.36/128,397.84 = 26,430.60/x - Step 3: Cross multiply
85,590.36x = 128,397.84 × 26,430.60 - Step 4: Simplify right side
85,590.36x = 3,393,631,949.90 - Step 5: Solve for x
x = 3,393,631,949.90/85,590.36 - Step 6: Final answer
x = 39,649.70
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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.