Finding the Fourth Proportional to 78,089.04, 107,762.36 and 42,278.99
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Solution
The fourth proportional to 78,089.04, 107,762.36 and 42,278.99 is: 58,344.72
Step by Step Solution
- Step 1: Write the proportion equation
78,089.04 : 107,762.36 = 42,278.99 : x - Step 2: Convert to fraction form
78,089.04/107,762.36 = 42,278.99/x - Step 3: Cross multiply
78,089.04x = 107,762.36 × 42,278.99 - Step 4: Simplify right side
78,089.04x = 4,556,082,990.61 - Step 5: Solve for x
x = 4,556,082,990.61/78,089.04 - Step 6: Final answer
x = 58,344.72
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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.