Finding the Fourth Proportional to 143,739.18, 198,281.99 and 90,013.70
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Solution
The fourth proportional to 143,739.18, 198,281.99 and 90,013.70 is: 124,170.02
Step by Step Solution
- Step 1: Write the proportion equation
143,739.18 : 198,281.99 = 90,013.70 : x - Step 2: Convert to fraction form
143,739.18/198,281.99 = 90,013.70/x - Step 3: Cross multiply
143,739.18x = 198,281.99 × 90,013.70 - Step 4: Simplify right side
143,739.18x = 17,848,096,284.00 - Step 5: Solve for x
x = 17,848,096,284.00/143,739.18 - Step 6: Final answer
x = 124,170.02
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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.