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Finding the Fourth Proportional to 57,366.20, 85,879.20 and 42,640.40

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Solution

The fourth proportional to 57,366.20, 85,879.20 and 42,640.40 is: 63,834.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,366.20 : 85,879.20 = 42,640.40 : x
  2. Step 2: Convert to fraction form
    57,366.20/85,879.20 = 42,640.40/x
  3. Step 3: Cross multiply
    57,366.20x = 85,879.20 × 42,640.40
  4. Step 4: Simplify right side
    57,366.20x = 3,661,923,439.68
  5. Step 5: Solve for x
    x = 3,661,923,439.68/57,366.20
  6. Step 6: Final answer
    x = 63,834.16

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1.5x scale

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.