Finding the Fourth Proportional to 86,723.36, 119,654.16 and 54,905.84
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Solution
The fourth proportional to 86,723.36, 119,654.16 and 54,905.84 is: 75,754.82
Step by Step Solution
- Step 1: Write the proportion equation
86,723.36 : 119,654.16 = 54,905.84 : x - Step 2: Convert to fraction form
86,723.36/119,654.16 = 54,905.84/x - Step 3: Cross multiply
86,723.36x = 119,654.16 × 54,905.84 - Step 4: Simplify right side
86,723.36x = 6,569,712,164.29 - Step 5: Solve for x
x = 6,569,712,164.29/86,723.36 - Step 6: Final answer
x = 75,754.82
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1.5x scale
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.