Finding the Fourth Proportional to 85,927.79, 128,905.97 and 36,011.65
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Solution
The fourth proportional to 85,927.79, 128,905.97 and 36,011.65 is: 54,023.45
Step by Step Solution
- Step 1: Write the proportion equation
85,927.79 : 128,905.97 = 36,011.65 : x - Step 2: Convert to fraction form
85,927.79/128,905.97 = 36,011.65/x - Step 3: Cross multiply
85,927.79x = 128,905.97 × 36,011.65 - Step 4: Simplify right side
85,927.79x = 4,642,115,849.96 - Step 5: Solve for x
x = 4,642,115,849.96/85,927.79 - Step 6: Final answer
x = 54,023.45
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.