Finding the Fourth Proportional to 77,986.95, 107,621.64 and 42,176.99
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Solution
The fourth proportional to 77,986.95, 107,621.64 and 42,176.99 is: 58,204.05
Step by Step Solution
- Step 1: Write the proportion equation
77,986.95 : 107,621.64 = 42,176.99 : x - Step 2: Convert to fraction form
77,986.95/107,621.64 = 42,176.99/x - Step 3: Cross multiply
77,986.95x = 107,621.64 × 42,176.99 - Step 4: Simplify right side
77,986.95x = 4,539,156,295.96 - Step 5: Solve for x
x = 4,539,156,295.96/77,986.95 - Step 6: Final answer
x = 58,204.05
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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.