Home / 100,814.20-139,107.32-57,785.78

Finding the Fourth Proportional to 100,814.20, 139,107.32 and 57,785.78

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Solution

The fourth proportional to 100,814.20, 139,107.32 and 57,785.78 is: 79,735.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,814.20 : 139,107.32 = 57,785.78 : x
  2. Step 2: Convert to fraction form
    100,814.20/139,107.32 = 57,785.78/x
  3. Step 3: Cross multiply
    100,814.20x = 139,107.32 × 57,785.78
  4. Step 4: Simplify right side
    100,814.20x = 8,038,424,323.18
  5. Step 5: Solve for x
    x = 8,038,424,323.18/100,814.20
  6. Step 6: Final answer
    x = 79,735.04

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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.