Finding the Fourth Proportional to 149,239.18, 205,955.12 and 81,258.80
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Solution
The fourth proportional to 149,239.18, 205,955.12 and 81,258.80 is: 112,139.89
Step by Step Solution
- Step 1: Write the proportion equation
149,239.18 : 205,955.12 = 81,258.80 : x - Step 2: Convert to fraction form
149,239.18/205,955.12 = 81,258.80/x - Step 3: Cross multiply
149,239.18x = 205,955.12 × 81,258.80 - Step 4: Simplify right side
149,239.18x = 16,735,665,249.83 - Step 5: Solve for x
x = 16,735,665,249.83/149,239.18 - Step 6: Final answer
x = 112,139.89
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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.