Finding the Fourth Proportional to 87,991.64, 121,434.90 and 50,265.08
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Solution
The fourth proportional to 87,991.64, 121,434.90 and 50,265.08 is: 69,369.49
Step by Step Solution
- Step 1: Write the proportion equation
87,991.64 : 121,434.90 = 50,265.08 : x - Step 2: Convert to fraction form
87,991.64/121,434.90 = 50,265.08/x - Step 3: Cross multiply
87,991.64x = 121,434.90 × 50,265.08 - Step 4: Simplify right side
87,991.64x = 6,103,934,963.29 - Step 5: Solve for x
x = 6,103,934,963.29/87,991.64 - Step 6: Final answer
x = 69,369.49
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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.