Finding the Fourth Proportional to 157,403.05, 217,209.87 and 85,781.53
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Solution
The fourth proportional to 157,403.05, 217,209.87 and 85,781.53 is: 118,375.06
Step by Step Solution
- Step 1: Write the proportion equation
157,403.05 : 217,209.87 = 85,781.53 : x - Step 2: Convert to fraction form
157,403.05/217,209.87 = 85,781.53/x - Step 3: Cross multiply
157,403.05x = 217,209.87 × 85,781.53 - Step 4: Simplify right side
157,403.05x = 18,632,594,979.70 - Step 5: Solve for x
x = 18,632,594,979.70/157,403.05 - Step 6: Final answer
x = 118,375.06
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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.