Finding the Fourth Proportional to 78,069.21, 107,646.35 and 62,154.33
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Solution
The fourth proportional to 78,069.21, 107,646.35 and 62,154.33 is: 85,701.99
Step by Step Solution
- Step 1: Write the proportion equation
78,069.21 : 107,646.35 = 62,154.33 : x - Step 2: Convert to fraction form
78,069.21/107,646.35 = 62,154.33/x - Step 3: Cross multiply
78,069.21x = 107,646.35 × 62,154.33 - Step 4: Simplify right side
78,069.21x = 6,690,686,450.42 - Step 5: Solve for x
x = 6,690,686,450.42/78,069.21 - Step 6: Final answer
x = 85,701.99
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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.