Finding the Fourth Proportional to 90,349.21, 135,534.75 and 85,373.79
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Solution
The fourth proportional to 90,349.21, 135,534.75 and 85,373.79 is: 128,071.02
Step by Step Solution
- Step 1: Write the proportion equation
90,349.21 : 135,534.75 = 85,373.79 : x - Step 2: Convert to fraction form
90,349.21/135,534.75 = 85,373.79/x - Step 3: Cross multiply
90,349.21x = 135,534.75 × 85,373.79 - Step 4: Simplify right side
90,349.21x = 11,571,115,284.20 - Step 5: Solve for x
x = 11,571,115,284.20/90,349.21 - Step 6: Final answer
x = 128,071.02
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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.