Finding the Fourth Proportional to 139,899.44, 193,051.98 and 78,655.07
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Solution
The fourth proportional to 139,899.44, 193,051.98 and 78,655.07 is: 108,538.79
Step by Step Solution
- Step 1: Write the proportion equation
139,899.44 : 193,051.98 = 78,655.07 : x - Step 2: Convert to fraction form
139,899.44/193,051.98 = 78,655.07/x - Step 3: Cross multiply
139,899.44x = 193,051.98 × 78,655.07 - Step 4: Simplify right side
139,899.44x = 15,184,516,035.28 - Step 5: Solve for x
x = 15,184,516,035.28/139,899.44 - Step 6: Final answer
x = 108,538.79
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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.