Finding the Fourth Proportional to 157,368.12, 217,165.20 and 85,748.70
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Solution
The fourth proportional to 157,368.12, 217,165.20 and 85,748.70 is: 118,331.68
Step by Step Solution
- Step 1: Write the proportion equation
157,368.12 : 217,165.20 = 85,748.70 : x - Step 2: Convert to fraction form
157,368.12/217,165.20 = 85,748.70/x - Step 3: Cross multiply
157,368.12x = 217,165.20 × 85,748.70 - Step 4: Simplify right side
157,368.12x = 18,621,633,585.24 - Step 5: Solve for x
x = 18,621,633,585.24/157,368.12 - Step 6: Final answer
x = 118,331.68
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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.