Finding the Fourth Proportional to 149,862.11, 206,807.30 and 81,877.62
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Solution
The fourth proportional to 149,862.11, 206,807.30 and 81,877.62 is: 112,989.80
Step by Step Solution
- Step 1: Write the proportion equation
149,862.11 : 206,807.30 = 81,877.62 : x - Step 2: Convert to fraction form
149,862.11/206,807.30 = 81,877.62/x - Step 3: Cross multiply
149,862.11x = 206,807.30 × 81,877.62 - Step 4: Simplify right side
149,862.11x = 16,932,889,522.63 - Step 5: Solve for x
x = 16,932,889,522.63/149,862.11 - Step 6: Final answer
x = 112,989.80
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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.