Finding the Fourth Proportional to 91,199.16, 125,856.90 and 57,209.08
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Solution
The fourth proportional to 91,199.16, 125,856.90 and 57,209.08 is: 78,949.82
Step by Step Solution
- Step 1: Write the proportion equation
91,199.16 : 125,856.90 = 57,209.08 : x - Step 2: Convert to fraction form
91,199.16/125,856.90 = 57,209.08/x - Step 3: Cross multiply
91,199.16x = 125,856.90 × 57,209.08 - Step 4: Simplify right side
91,199.16x = 7,200,157,460.65 - Step 5: Solve for x
x = 7,200,157,460.65/91,199.16 - Step 6: Final answer
x = 78,949.82
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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.