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Finding the Fourth Proportional to 75,687.77, 103,692.72 and 72,850.07

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Solution

The fourth proportional to 75,687.77, 103,692.72 and 72,850.07 is: 99,805.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,687.77 : 103,692.72 = 72,850.07 : x
  2. Step 2: Convert to fraction form
    75,687.77/103,692.72 = 72,850.07/x
  3. Step 3: Cross multiply
    75,687.77x = 103,692.72 × 72,850.07
  4. Step 4: Simplify right side
    75,687.77x = 7,554,021,392.03
  5. Step 5: Solve for x
    x = 7,554,021,392.03/75,687.77
  6. Step 6: Final answer
    x = 99,805.05

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.