Finding the Fourth Proportional to 78,621.52, 108,603.84 and 62,816.80
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Solution
The fourth proportional to 78,621.52, 108,603.84 and 62,816.80 is: 86,771.99
Step by Step Solution
- Step 1: Write the proportion equation
78,621.52 : 108,603.84 = 62,816.80 : x - Step 2: Convert to fraction form
78,621.52/108,603.84 = 62,816.80/x - Step 3: Cross multiply
78,621.52x = 108,603.84 × 62,816.80 - Step 4: Simplify right side
78,621.52x = 6,822,145,696.51 - Step 5: Solve for x
x = 6,822,145,696.51/78,621.52 - Step 6: Final answer
x = 86,771.99
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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.