Finding the Fourth Proportional to 78,229.12, 107,927.84 and 51,386.08
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Solution
The fourth proportional to 78,229.12, 107,927.84 and 51,386.08 is: 70,894.17
Step by Step Solution
- Step 1: Write the proportion equation
78,229.12 : 107,927.84 = 51,386.08 : x - Step 2: Convert to fraction form
78,229.12/107,927.84 = 51,386.08/x - Step 3: Cross multiply
78,229.12x = 107,927.84 × 51,386.08 - Step 4: Simplify right side
78,229.12x = 5,545,988,620.47 - Step 5: Solve for x
x = 5,545,988,620.47/78,229.12 - Step 6: Final answer
x = 70,894.17
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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.