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Finding the Fourth Proportional to 71,396.80, 106,992.80 and 52,529.60

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Solution

The fourth proportional to 71,396.80, 106,992.80 and 52,529.60 is: 78,719.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,396.80 : 106,992.80 = 52,529.60 : x
  2. Step 2: Convert to fraction form
    71,396.80/106,992.80 = 52,529.60/x
  3. Step 3: Cross multiply
    71,396.80x = 106,992.80 × 52,529.60
  4. Step 4: Simplify right side
    71,396.80x = 5,620,288,986.88
  5. Step 5: Solve for x
    x = 5,620,288,986.88/71,396.80
  6. Step 6: Final answer
    x = 78,719.06

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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.