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Finding the Fourth Proportional to 71,282.69, 106,919.88 and 18,692.16

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Solution

The fourth proportional to 71,282.69, 106,919.88 and 18,692.16 is: 28,037.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,282.69 : 106,919.88 = 18,692.16 : x
  2. Step 2: Convert to fraction form
    71,282.69/106,919.88 = 18,692.16/x
  3. Step 3: Cross multiply
    71,282.69x = 106,919.88 × 18,692.16
  4. Step 4: Simplify right side
    71,282.69x = 1,998,563,504.14
  5. Step 5: Solve for x
    x = 1,998,563,504.14/71,282.69
  6. Step 6: Final answer
    x = 28,037.15

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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.