Home / 71,129.12-106,692.61-21,209.43

Finding the Fourth Proportional to 71,129.12, 106,692.61 and 21,209.43

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Solution

The fourth proportional to 71,129.12, 106,692.61 and 21,209.43 is: 31,813.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,129.12 : 106,692.61 = 21,209.43 : x
  2. Step 2: Convert to fraction form
    71,129.12/106,692.61 = 21,209.43/x
  3. Step 3: Cross multiply
    71,129.12x = 106,692.61 × 21,209.43
  4. Step 4: Simplify right side
    71,129.12x = 2,262,889,337.27
  5. Step 5: Solve for x
    x = 2,262,889,337.27/71,129.12
  6. Step 6: Final answer
    x = 31,813.82

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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.