Finding the Fourth Proportional to 128,777.04, 177,723.72 and 77,815.08
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Solution
The fourth proportional to 128,777.04, 177,723.72 and 77,815.08 is: 107,391.70
Step by Step Solution
- Step 1: Write the proportion equation
128,777.04 : 177,723.72 = 77,815.08 : x - Step 2: Convert to fraction form
128,777.04/177,723.72 = 77,815.08/x - Step 3: Cross multiply
128,777.04x = 177,723.72 × 77,815.08 - Step 4: Simplify right side
128,777.04x = 13,829,585,489.70 - Step 5: Solve for x
x = 13,829,585,489.70/128,777.04 - Step 6: Final answer
x = 107,391.70
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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.