Finding the Fourth Proportional to 138,964.02, 191,777.67 and 78,536.94
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Solution
The fourth proportional to 138,964.02, 191,777.67 and 78,536.94 is: 108,385.12
Step by Step Solution
- Step 1: Write the proportion equation
138,964.02 : 191,777.67 = 78,536.94 : x - Step 2: Convert to fraction form
138,964.02/191,777.67 = 78,536.94/x - Step 3: Cross multiply
138,964.02x = 191,777.67 × 78,536.94 - Step 4: Simplify right side
138,964.02x = 15,061,631,362.13 - Step 5: Solve for x
x = 15,061,631,362.13/138,964.02 - Step 6: Final answer
x = 108,385.12
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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.