Finding the Fourth Proportional to 78,012.36, 107,656.62 and 42,202.26
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Solution
The fourth proportional to 78,012.36, 107,656.62 and 42,202.26 is: 58,238.88
Step by Step Solution
- Step 1: Write the proportion equation
78,012.36 : 107,656.62 = 42,202.26 : x - Step 2: Convert to fraction form
78,012.36/107,656.62 = 42,202.26/x - Step 3: Cross multiply
78,012.36x = 107,656.62 × 42,202.26 - Step 4: Simplify right side
78,012.36x = 4,543,352,667.96 - Step 5: Solve for x
x = 4,543,352,667.96/78,012.36 - Step 6: Final answer
x = 58,238.88
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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.