Finding the Fourth Proportional to 149,878.11, 206,839.68 and 86,225.49
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Solution
The fourth proportional to 149,878.11, 206,839.68 and 86,225.49 is: 118,995.71
Step by Step Solution
- Step 1: Write the proportion equation
149,878.11 : 206,839.68 = 86,225.49 : x - Step 2: Convert to fraction form
149,878.11/206,839.68 = 86,225.49/x - Step 3: Cross multiply
149,878.11x = 206,839.68 × 86,225.49 - Step 4: Simplify right side
149,878.11x = 17,834,852,759.44 - Step 5: Solve for x
x = 17,834,852,759.44/149,878.11 - Step 6: Final answer
x = 118,995.71
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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.