Finding the Fourth Proportional to 77,619.12, 107,041.68 and 61,756.08
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Solution
The fourth proportional to 77,619.12, 107,041.68 and 61,756.08 is: 85,165.54
Step by Step Solution
- Step 1: Write the proportion equation
77,619.12 : 107,041.68 = 61,756.08 : x - Step 2: Convert to fraction form
77,619.12/107,041.68 = 61,756.08/x - Step 3: Cross multiply
77,619.12x = 107,041.68 × 61,756.08 - Step 4: Simplify right side
77,619.12x = 6,610,474,553.41 - Step 5: Solve for x
x = 6,610,474,553.41/77,619.12 - Step 6: Final answer
x = 85,165.54
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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.