Finding the Fourth Proportional to 68,637.20, 102,955.80 and 66,012.80
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Solution
The fourth proportional to 68,637.20, 102,955.80 and 66,012.80 is: 99,019.20
Step by Step Solution
- Step 1: Write the proportion equation
68,637.20 : 102,955.80 = 66,012.80 : x - Step 2: Convert to fraction form
68,637.20/102,955.80 = 66,012.80/x - Step 3: Cross multiply
68,637.20x = 102,955.80 × 66,012.80 - Step 4: Simplify right side
68,637.20x = 6,796,400,634.24 - Step 5: Solve for x
x = 6,796,400,634.24/68,637.20 - Step 6: Final answer
x = 99,019.20
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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.