Finding the Fourth Proportional to 149,862.61, 206,807.99 and 81,878.12
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Solution
The fourth proportional to 149,862.61, 206,807.99 and 81,878.12 is: 112,990.49
Step by Step Solution
- Step 1: Write the proportion equation
149,862.61 : 206,807.99 = 81,878.12 : x - Step 2: Convert to fraction form
149,862.61/206,807.99 = 81,878.12/x - Step 3: Cross multiply
149,862.61x = 206,807.99 × 81,878.12 - Step 4: Simplify right side
149,862.61x = 16,933,049,422.18 - Step 5: Solve for x
x = 16,933,049,422.18/149,862.61 - Step 6: Final answer
x = 112,990.49
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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.