Finding the Fourth Proportional to 138,646.92, 191,332.76 and 74,984.70
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Solution
The fourth proportional to 138,646.92, 191,332.76 and 74,984.70 is: 103,478.89
Step by Step Solution
- Step 1: Write the proportion equation
138,646.92 : 191,332.76 = 74,984.70 : x - Step 2: Convert to fraction form
138,646.92/191,332.76 = 74,984.70/x - Step 3: Cross multiply
138,646.92x = 191,332.76 × 74,984.70 - Step 4: Simplify right side
138,646.92x = 14,347,029,608.77 - Step 5: Solve for x
x = 14,347,029,608.77/138,646.92 - Step 6: Final answer
x = 103,478.89
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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.