Finding the Fourth Proportional to 100,655.19, 138,905.93 and 55,335.08
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Solution
The fourth proportional to 100,655.19, 138,905.93 and 55,335.08 is: 76,363.38
Step by Step Solution
- Step 1: Write the proportion equation
100,655.19 : 138,905.93 = 55,335.08 : x - Step 2: Convert to fraction form
100,655.19/138,905.93 = 55,335.08/x - Step 3: Cross multiply
100,655.19x = 138,905.93 × 55,335.08 - Step 4: Simplify right side
100,655.19x = 7,686,370,749.02 - Step 5: Solve for x
x = 7,686,370,749.02/100,655.19 - Step 6: Final answer
x = 76,363.38
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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.