Home / 203,212.48-280,443.28-122,638.72

Finding the Fourth Proportional to 203,212.48, 280,443.28 and 122,638.72

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Solution

The fourth proportional to 203,212.48, 280,443.28 and 122,638.72 is: 169,247.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,212.48 : 280,443.28 = 122,638.72 : x
  2. Step 2: Convert to fraction form
    203,212.48/280,443.28 = 122,638.72/x
  3. Step 3: Cross multiply
    203,212.48x = 280,443.28 × 122,638.72
  4. Step 4: Simplify right side
    203,212.48x = 34,393,204,891.80
  5. Step 5: Solve for x
    x = 34,393,204,891.80/203,212.48
  6. Step 6: Final answer
    x = 169,247.50

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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.