Finding the Fourth Proportional to 280,623.78, 420,921.99 and 103,117.14
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Solution
The fourth proportional to 280,623.78, 420,921.99 and 103,117.14 is: 154,670.68
Step by Step Solution
- Step 1: Write the proportion equation
280,623.78 : 420,921.99 = 103,117.14 : x - Step 2: Convert to fraction form
280,623.78/420,921.99 = 103,117.14/x - Step 3: Cross multiply
280,623.78x = 420,921.99 × 103,117.14 - Step 4: Simplify right side
280,623.78x = 43,404,271,771.91 - Step 5: Solve for x
x = 43,404,271,771.91/280,623.78 - Step 6: Final answer
x = 154,670.68
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1.5x scale
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.