Finding the Fourth Proportional to 128,164.32, 176,854.62 and 74,447.88
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Solution
The fourth proportional to 128,164.32, 176,854.62 and 74,447.88 is: 102,731.02
Step by Step Solution
- Step 1: Write the proportion equation
128,164.32 : 176,854.62 = 74,447.88 : x - Step 2: Convert to fraction form
128,164.32/176,854.62 = 74,447.88/x - Step 3: Cross multiply
128,164.32x = 176,854.62 × 74,447.88 - Step 4: Simplify right side
128,164.32x = 13,166,451,527.21 - Step 5: Solve for x
x = 13,166,451,527.21/128,164.32 - Step 6: Final answer
x = 102,731.02
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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.