Finding the Fourth Proportional to 78,211.04, 107,902.95 and 51,368.09
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Solution
The fourth proportional to 78,211.04, 107,902.95 and 51,368.09 is: 70,869.39
Step by Step Solution
- Step 1: Write the proportion equation
78,211.04 : 107,902.95 = 51,368.09 : x - Step 2: Convert to fraction form
78,211.04/107,902.95 = 51,368.09/x - Step 3: Cross multiply
78,211.04x = 107,902.95 × 51,368.09 - Step 4: Simplify right side
78,211.04x = 5,542,768,446.87 - Step 5: Solve for x
x = 5,542,768,446.87/78,211.04 - Step 6: Final answer
x = 70,869.39
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1.5x scale
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.