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Finding the Fourth Proportional to 67,122, 100,692.72 and 20,374.92

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Solution

The fourth proportional to 67,122, 100,692.72 and 20,374.92 is: 30,565.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,122 : 100,692.72 = 20,374.92 : x
  2. Step 2: Convert to fraction form
    67,122/100,692.72 = 20,374.92/x
  3. Step 3: Cross multiply
    67,122x = 100,692.72 × 20,374.92
  4. Step 4: Simplify right side
    67,122x = 2,051,606,114.58
  5. Step 5: Solve for x
    x = 2,051,606,114.58/67,122
  6. Step 6: Final answer
    x = 30,565.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.