Finding the Fourth Proportional to 81,312.57, 121,903.12 and 33,963.94
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Solution
The fourth proportional to 81,312.57, 121,903.12 and 33,963.94 is: 50,918.45
Step by Step Solution
- Step 1: Write the proportion equation
81,312.57 : 121,903.12 = 33,963.94 : x - Step 2: Convert to fraction form
81,312.57/121,903.12 = 33,963.94/x - Step 3: Cross multiply
81,312.57x = 121,903.12 × 33,963.94 - Step 4: Simplify right side
81,312.57x = 4,140,310,274.77 - Step 5: Solve for x
x = 4,140,310,274.77/81,312.57 - Step 6: Final answer
x = 50,918.45
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.