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Finding the Fourth Proportional to 380,081.20, 570,121.80 and 99,626.80

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Solution

The fourth proportional to 380,081.20, 570,121.80 and 99,626.80 is: 149,440.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,081.20 : 570,121.80 = 99,626.80 : x
  2. Step 2: Convert to fraction form
    380,081.20/570,121.80 = 99,626.80/x
  3. Step 3: Cross multiply
    380,081.20x = 570,121.80 × 99,626.80
  4. Step 4: Simplify right side
    380,081.20x = 56,799,410,544.24
  5. Step 5: Solve for x
    x = 56,799,410,544.24/380,081.20
  6. Step 6: Final answer
    x = 149,440.20

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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.