Finding the Fourth Proportional to 77,988.97, 107,624.77 and 42,178.98
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Solution
The fourth proportional to 77,988.97, 107,624.77 and 42,178.98 is: 58,206.99
Step by Step Solution
- Step 1: Write the proportion equation
77,988.97 : 107,624.77 = 42,178.98 : x - Step 2: Convert to fraction form
77,988.97/107,624.77 = 42,178.98/x - Step 3: Cross multiply
77,988.97x = 107,624.77 × 42,178.98 - Step 4: Simplify right side
77,988.97x = 4,539,503,139.00 - Step 5: Solve for x
x = 4,539,503,139.00/77,988.97 - Step 6: Final answer
x = 58,206.99
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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.