Finding the Fourth Proportional to 98,724.20, 136,224.42 and 56,280.68
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Solution
The fourth proportional to 98,724.20, 136,224.42 and 56,280.68 is: 77,658.80
Step by Step Solution
- Step 1: Write the proportion equation
98,724.20 : 136,224.42 = 56,280.68 : x - Step 2: Convert to fraction form
98,724.20/136,224.42 = 56,280.68/x - Step 3: Cross multiply
98,724.20x = 136,224.42 × 56,280.68 - Step 4: Simplify right side
98,724.20x = 7,666,802,990.21 - Step 5: Solve for x
x = 7,666,802,990.21/98,724.20 - Step 6: Final answer
x = 77,658.80
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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.