Home / 100,729.90-139,007.56-55,412.52

Finding the Fourth Proportional to 100,729.90, 139,007.56 and 55,412.52

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Solution

The fourth proportional to 100,729.90, 139,007.56 and 55,412.52 is: 76,469.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,729.90 : 139,007.56 = 55,412.52 : x
  2. Step 2: Convert to fraction form
    100,729.90/139,007.56 = 55,412.52/x
  3. Step 3: Cross multiply
    100,729.90x = 139,007.56 × 55,412.52
  4. Step 4: Simplify right side
    100,729.90x = 7,702,759,198.65
  5. Step 5: Solve for x
    x = 7,702,759,198.65/100,729.90
  6. Step 6: Final answer
    x = 76,469.44

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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.