Home / 74,664.40-111,923.70-66,791.20

Finding the Fourth Proportional to 74,664.40, 111,923.70 and 66,791.20

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Solution

The fourth proportional to 74,664.40, 111,923.70 and 66,791.20 is: 100,121.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,664.40 : 111,923.70 = 66,791.20 : x
  2. Step 2: Convert to fraction form
    74,664.40/111,923.70 = 66,791.20/x
  3. Step 3: Cross multiply
    74,664.40x = 111,923.70 × 66,791.20
  4. Step 4: Simplify right side
    74,664.40x = 7,475,518,231.44
  5. Step 5: Solve for x
    x = 7,475,518,231.44/74,664.40
  6. Step 6: Final answer
    x = 100,121.59

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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.