Finding the Fourth Proportional to 138,036.42, 190,497.02 and 77,626.08
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Solution
The fourth proportional to 138,036.42, 190,497.02 and 77,626.08 is: 107,127.79
Step by Step Solution
- Step 1: Write the proportion equation
138,036.42 : 190,497.02 = 77,626.08 : x - Step 2: Convert to fraction form
138,036.42/190,497.02 = 77,626.08/x - Step 3: Cross multiply
138,036.42x = 190,497.02 × 77,626.08 - Step 4: Simplify right side
138,036.42x = 14,787,536,526.15 - Step 5: Solve for x
x = 14,787,536,526.15/138,036.42 - Step 6: Final answer
x = 107,127.79
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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.