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Finding the Fourth Proportional to 228,812.22, 315,745.83 and 128,190.78

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Solution

The fourth proportional to 228,812.22, 315,745.83 and 128,190.78 is: 176,894.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,812.22 : 315,745.83 = 128,190.78 : x
  2. Step 2: Convert to fraction form
    228,812.22/315,745.83 = 128,190.78/x
  3. Step 3: Cross multiply
    228,812.22x = 315,745.83 × 128,190.78
  4. Step 4: Simplify right side
    228,812.22x = 40,475,704,229.45
  5. Step 5: Solve for x
    x = 40,475,704,229.45/228,812.22
  6. Step 6: Final answer
    x = 176,894.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.