Finding the Fourth Proportional to 100,263.75, 138,363.99 and 59,979.21
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Solution
The fourth proportional to 100,263.75, 138,363.99 and 59,979.21 is: 82,771.32
Step by Step Solution
- Step 1: Write the proportion equation
100,263.75 : 138,363.99 = 59,979.21 : x - Step 2: Convert to fraction form
100,263.75/138,363.99 = 59,979.21/x - Step 3: Cross multiply
100,263.75x = 138,363.99 × 59,979.21 - Step 4: Simplify right side
100,263.75x = 8,298,962,812.65 - Step 5: Solve for x
x = 8,298,962,812.65/100,263.75 - Step 6: Final answer
x = 82,771.32
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1.5x scale
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.