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Finding the Fourth Proportional to 71,128.60, 106,692.24 and 28,998.82

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Solution

The fourth proportional to 71,128.60, 106,692.24 and 28,998.82 is: 43,497.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,128.60 : 106,692.24 = 28,998.82 : x
  2. Step 2: Convert to fraction form
    71,128.60/106,692.24 = 28,998.82/x
  3. Step 3: Cross multiply
    71,128.60x = 106,692.24 × 28,998.82
  4. Step 4: Simplify right side
    71,128.60x = 3,093,949,063.16
  5. Step 5: Solve for x
    x = 3,093,949,063.16/71,128.60
  6. Step 6: Final answer
    x = 43,497.96

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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.