Home / 280,469.04-420,707.20-80,792.72

Finding the Fourth Proportional to 280,469.04, 420,707.20 and 80,792.72

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Solution

The fourth proportional to 280,469.04, 420,707.20 and 80,792.72 is: 121,190.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,469.04 : 420,707.20 = 80,792.72 : x
  2. Step 2: Convert to fraction form
    280,469.04/420,707.20 = 80,792.72/x
  3. Step 3: Cross multiply
    280,469.04x = 420,707.20 × 80,792.72
  4. Step 4: Simplify right side
    280,469.04x = 33,990,079,011.58
  5. Step 5: Solve for x
    x = 33,990,079,011.58/280,469.04
  6. Step 6: Final answer
    x = 121,190.13

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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.