Finding the Fourth Proportional to 208,603.21, 287,878.09 and 117,972.73
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Solution
The fourth proportional to 208,603.21, 287,878.09 and 117,972.73 is: 162,805.56
Step by Step Solution
- Step 1: Write the proportion equation
208,603.21 : 287,878.09 = 117,972.73 : x - Step 2: Convert to fraction form
208,603.21/287,878.09 = 117,972.73/x - Step 3: Cross multiply
208,603.21x = 287,878.09 × 117,972.73 - Step 4: Simplify right side
208,603.21x = 33,961,762,155.23 - Step 5: Solve for x
x = 33,961,762,155.23/208,603.21 - Step 6: Final answer
x = 162,805.56
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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.