Finding the Fourth Proportional to 139,887.21, 209,860.64 and 45,122.71
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Solution
The fourth proportional to 139,887.21, 209,860.64 and 45,122.71 is: 67,693.69
Step by Step Solution
- Step 1: Write the proportion equation
139,887.21 : 209,860.64 = 45,122.71 : x - Step 2: Convert to fraction form
139,887.21/209,860.64 = 45,122.71/x - Step 3: Cross multiply
139,887.21x = 209,860.64 × 45,122.71 - Step 4: Simplify right side
139,887.21x = 9,469,480,799.13 - Step 5: Solve for x
x = 9,469,480,799.13/139,887.21 - Step 6: Final answer
x = 67,693.69
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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.