Finding the Fourth Proportional to 77,478.90, 106,922.03 and 74,797.09
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Solution
The fourth proportional to 77,478.90, 106,922.03 and 74,797.09 is: 103,221.09
Step by Step Solution
- Step 1: Write the proportion equation
77,478.90 : 106,922.03 = 74,797.09 : x - Step 2: Convert to fraction form
77,478.90/106,922.03 = 74,797.09/x - Step 3: Cross multiply
77,478.90x = 106,922.03 × 74,797.09 - Step 4: Simplify right side
77,478.90x = 7,997,456,059.60 - Step 5: Solve for x
x = 7,997,456,059.60/77,478.90 - Step 6: Final answer
x = 103,221.09
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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.