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Finding the Fourth Proportional to 123,690.38, 170,692.79 and 67,101.75

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Solution

The fourth proportional to 123,690.38, 170,692.79 and 67,101.75 is: 92,600.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,690.38 : 170,692.79 = 67,101.75 : x
  2. Step 2: Convert to fraction form
    123,690.38/170,692.79 = 67,101.75/x
  3. Step 3: Cross multiply
    123,690.38x = 170,692.79 × 67,101.75
  4. Step 4: Simplify right side
    123,690.38x = 11,453,784,585.87
  5. Step 5: Solve for x
    x = 11,453,784,585.87/123,690.38
  6. Step 6: Final answer
    x = 92,600.45

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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.