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Finding the Fourth Proportional to 220,429.87, 330,792.36 and 80,188.50

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Solution

The fourth proportional to 220,429.87, 330,792.36 and 80,188.50 is: 120,336.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,429.87 : 330,792.36 = 80,188.50 : x
  2. Step 2: Convert to fraction form
    220,429.87/330,792.36 = 80,188.50/x
  3. Step 3: Cross multiply
    220,429.87x = 330,792.36 × 80,188.50
  4. Step 4: Simplify right side
    220,429.87x = 26,525,742,238.92
  5. Step 5: Solve for x
    x = 26,525,742,238.92/220,429.87
  6. Step 6: Final answer
    x = 120,336.42

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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.