Finding the Fourth Proportional to 129,519.90, 178,746.62 and 72,162.99
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Solution
The fourth proportional to 129,519.90, 178,746.62 and 72,162.99 is: 99,590.03
Step by Step Solution
- Step 1: Write the proportion equation
129,519.90 : 178,746.62 = 72,162.99 : x - Step 2: Convert to fraction form
129,519.90/178,746.62 = 72,162.99/x - Step 3: Cross multiply
129,519.90x = 178,746.62 × 72,162.99 - Step 4: Simplify right side
129,519.90x = 12,898,890,190.78 - Step 5: Solve for x
x = 12,898,890,190.78/129,519.90 - Step 6: Final answer
x = 99,590.03
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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.