Home / 142,828.20-214,242.30-90,469.80

Finding the Fourth Proportional to 142,828.20, 214,242.30 and 90,469.80

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Solution

The fourth proportional to 142,828.20, 214,242.30 and 90,469.80 is: 135,704.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,828.20 : 214,242.30 = 90,469.80 : x
  2. Step 2: Convert to fraction form
    142,828.20/214,242.30 = 90,469.80/x
  3. Step 3: Cross multiply
    142,828.20x = 214,242.30 × 90,469.80
  4. Step 4: Simplify right side
    142,828.20x = 19,382,458,032.54
  5. Step 5: Solve for x
    x = 19,382,458,032.54/142,828.20
  6. Step 6: Final answer
    x = 135,704.70

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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.